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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

For the fiscal year ended December 31, 2004

or

Commission File Number 0-27084

CITRIX SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:

(954) 267-3000

Securities registered pursuant to Section 12(b) of the Act:

None

Securities registered pursuant to Section 12(g) of the Act:

Common Stock, $.001 Par Value

(Title of class)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    x

Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes  x    No  ¨

The aggregate market value of Common Stock held by non-affiliates of the registrant computed by reference to the price of the registrant’s Common Stock as of the last business day of the registrant’s most recently completed second fiscal quarter (based on the last reported sale price on The Nasdaq National Market as of such date) was $3,464,675,126. As of March 8, 2005 there were 169,486,037 shares of the registrant’s Common Stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

The information required pursuant to Part III of this report is incorporated by reference from the Company’s definitive proxy statement, relating to the annual meeting of stockholders to be held in May 2005, pursuant to Regulation 14A to be filed with the Securities and Exchange Commission.

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CITRIX SYSTEMS, INC.

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I TEM 1.    BUSINESS

General

Citrix Systems, Inc. (“Citrix” or the “Company”), is a Delaware corporation founded on April 17, 1989. The Company designs, develops and markets access infrastructure software, services and appliances. The Company markets and licenses its products through multiple channels such as value-added resellers, channel distributors, system integrators, independent software vendors and its websites. The Company also promotes its products through relationships with a wide variety of industry participants, including Microsoft Corporation (“Microsoft”).

Business Strategy

Citrix is committed to achieving its vision of making every organization an on-demand enterprise where information is securely, easily and instantly accessible from virtually anywhere using any device. The Company’s business strategy leverages its ability to create and lead new markets through innovation and execution in all phases of product development, marketing and fulfillment.

The Company’s first wave of innovation, in the mid-1990s, enabled the virtualization of the Windows desktop, which made thin-client computing possible. The Company’s second wave of innovation, in the late-1990s, enabled the virtualization and centralization of most application types, making server-based computing possible. The Company’s third and ongoing wave of innovation is focused on creating access infrastructure that connects devices, networks and applications into a core business system that makes on-demand computing a reality.

Citrix Access Infrastructure as a Core Business System

The Company believes that access infrastructure has the potential of being viewed as a core business system because it solves a core business problem: getting the right information securely, easily and instantly to everyone who needs it, when they need it, wherever they are. This is becoming more difficult to accomplish as more and more people conduct business in remote and mobile situations – unpredictably moving from location to location, using multiple access devices, and connecting with a wide range of heterogeneous applications over wired, wireless and Web networks.

To meet this challenge, Citrix’s access infrastructure addresses one of the basic technical challenges businesses face today: the need to provide secure access to private information over both trusted and untrusted networks. Access infrastructure accomplishes this by connecting devices, networks and applications into a system that provides secure, easy and instant access to virtually any information source, for any authorized user, from virtually anywhere, using any connection.

The Company believes that its Citrix access infrastructure helps to transform any organization into an on-demand enterprise. This means that, for a single investment in access infrastructure, businesses get two key benefits: improved operational efficiency that reduces the cost of running Citrix’s business, and accelerated agility that enables the business to capitalize on more opportunities for growing the business.

When used together, Citrix access infrastructure products, including software, services and appliance-based solutions provide a set of capabilities that meet the access needs of end-users on the demand side of the information supply chain, as well as the needs of IT administrators on the supply side of the information supply chain. These capabilities include:

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Citrix access infrastructure is sold as the Citrix MetaFrame Access Suite, as Citrix Online services, and beginning in 2005 as Citrix Gateway appliances. In addition to its access infrastructure solution portfolio of products and services, Citrix also offers customers consulting services, technical support services and product training and certification services.

The Citrix^® MetaFrame^® Access Suite Products

The Citrix MetaFrame Access Suite enables organizations to provide a secure, single point of access to enterprise applications and information on demand. The MetaFrame Access Suite centralizes access to applications and information and enables information technology (“IT”) staffs to deliver, manage, monitor and measure enterprise resources on demand. Citrix customers are able to run IT as a corporate computing utility, providing software as a service. This simplifies the complexity and reduces the costs of deploying and administering hundreds of heterogeneous applications and delivering them to end-users on demand virtually anywhere, anytime, to any device, over any connection.

In the MetaFrame Access Suite, each component product solves a particular access challenge for an organization, while all of the products work together seamlessly to enable the on-demand enterprise.

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Collectively, these products accounted for approximately 50%, 63% and 69% of the Company’s net revenues in 2004, 2003 and 2002, respectively and are included in software licenses revenue in the accompanying consolidated statements of income.

Citrix Online Services

In February 2004, the Company acquired Expertcity.com, Inc. (“Expertcity”), a market leader in Web-based desktop access as well as a leader in Web-based training and customer assistance products. During 2004, Expertcity was integrated into the Company as the Citrix Online division. The Company’s portfolio of access services now includes the following:

Citrix Online services accounted for approximately 6.0% of the Company’s net revenues in 2004 and is included in services revenue in the accompanying consolidated statements of income.

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Citrix Access Gateway Products

In December 2004, the Company acquired Net6 Inc., a leader in providing secure access gateways. Beginning in 2005, the Company’s portfolio of access gateway appliances will include:

Citrix Services

Citrix provides a portfolio of services designed to allow the Company’s end-customers and entities with which it has a technology relationship to maximize the value of Citrix access infrastructure software. These services are available as a feature of the Company’s business-development program and are available for additional fees to end-customers.

These services accounted for approximately 8% of the Company’s net revenues in 2004, 2003 and 2002 and are included in services revenue in the Company’s accompanying consolidated statements of income.

Citrix Technology

Citrix products are based on a full range of industry-standard technologies. In addition, some Citrix products also include the Company’s proprietary technologies known as the Independent Computing Architecture (“ICA”) protocol, which allows an application’s graphical end-user interface to be displayed on virtually any client device while the application logic is executed on a central server. Because the ICA^® protocol moves client-based application processing to the server, this approach enables centralized management of applications, end-users, servers, licenses and other system components for greater efficiency and lower cost.

The Company’s ICA^® technology also minimizes the amount of data traveling across an end-user’s network as only encrypted screen refreshes, keystrokes and mouse clicks are transported to and from the client device. This increases remote access security, improves application performance and allows even wireless access to the latest, most powerful applications and information.

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Citrix products are also based on the industry-standard Extensible Markup Language (“XML”). Leveraging XML assures open systems interaction for customers regardless of data source or platform. And by supporting XML, which is the standard for future Web services-based applications, Citrix helps customers get from the client/server world of today to the Web services environments of tomorrow.

Citrix Customers

Citrix offers a portfolio of products and services that target small, medium and large sized organizations in the commercial, government and education sectors. Currently, Citrix has more than 160,000 customers worldwide, including 100% of the Fortune 100, 99% of the Fortune 500 and 97% of the Fortune Global 100.

The Company offers perpetual software licenses for MetaFrame Access Suite products, annual subscriptions for Web-based Citrix Online services, and beginning in 2005 specialized hardware appliances for Citrix Access Gateway products. Perpetual license software products come in both “shrink wrapped” and electronic-based forms. The Company distributes the software in various formats including traditional “boxed” packages for small projects and customers and electronically downloaded formats for its large projects and enterprise customers. The Company’s Web-based services can be accessed over any Internet connection during the subscription period. Hardware appliances come pre-loaded with software for which customers can purchase perpetual licenses.

Technology Relationships

The Company has entered into a number of technology relationships to develop customer markets for its products, broaden the use of the ICA protocol as an industry standard technology for distributed Windows and non Windows applications and to accelerate the development of its existing and future product lines.

Microsoft.    Since its inception, the Company has had a number of license agreements with Microsoft, including licenses relating to Microsoft OS/2, Windows 3.x, Windows for Workgroups, Windows NT^®, Windows CE and Internet Explorer. These agreements have provided the Company with access to certain Microsoft source and object code, technical support and other materials.

In May 1997, the Company entered into a five-year joint license, development and marketing agreement with Microsoft, (as amended, the “Microsoft Development Agreement”), pursuant to which the Company licensed its multi-user Windows NT extensions to Microsoft for inclusion in future versions of Windows NT server software. Pursuant to the Microsoft Development Agreement, the Company’s multi-user Windows NT extensions technology was incorporated into Microsoft’s NT Terminal Server, which was released in July 1998, and Windows 2000 Server, which was released in February 2000.

In May 2002, the Company signed an agreement with Microsoft to provide the Company with access to Microsoft Windows Server source code for current and future Microsoft Server operating systems, including access to Windows Server 2003 and terminal services source code, during the three year term of the agreement. This agreement was terminated in December 2004 and did not provide for payments to or from Microsoft.

In December 2004, the Company entered into a technology collaboration agreement with Microsoft to further enhance the overall extensibility of Windows^® Terminal Server. In conjunction with the technology collaboration agreement, the Company and Microsoft entered into a patent cross license and source code licensing agreements to renew the Company’s access to source code for current versions of Microsoft Windows Server that had previously been provided to the Company pursuant to the agreement between Microsoft and the Company dated May 2002. The technology collaboration agreement also provides for access by the Company to the source code for the forthcoming Microsoft Windows Server codenamed “Longhorn.” The technology collaboration agreement has a five-year term which expires in December 2009. The technology collaboration, patent cross license and source code licensing agreements do not provide for payments to or from Microsoft.

There can be no assurances that the Company’s agreements with Microsoft will be extended or renewed by Microsoft upon their respective expirations or that, if renewed or extended, such agreements will be on terms favorable to the Company. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Certain Factors Which May Affect Future Results.”

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Additional Relationships.    As of December 31, 2004, the Company had entered into approximately 100 ICA license agreements. Currently, numerous devices incorporate Citrix ICA, including Windows CE devices, Macintosh clients, Linux Terminals, and other information appliances, such as wireless phones and other handheld devices. ICA licensees include Wyse Technologies, Hewlett-Packard, Neoware, Fujitsu, MaxSpeed and SAP AG, among others.

In addition, the Citrix accessPARTNER network includes Citrix Alliance Partners^™ , which are a coalition of industry-leading companies from across the IT spectrum who work with the Company to design and market complementary solutions for the Company and the customers of Citrix Alliance Partners. The Company’s existing alliance and channel programs, including the Citrix Business Alliance, are now included as part of the Citrix accessPARTNER network. For further information on the Citrix accessPARTNER network see “— Sales, Marketing and Support.” By the end of 2004, the number of Citrix Alliance Partners had grown to approximately 1,800 members, including hardware, software, global and regional consulting alliances. Citrix Premier Plus Alliance Partners include Microsoft, Dell, IBM, EMC², Hewlett-Packard, Siebel Systems, SAP AG, Sun Microsystems and Oracle.

Research and Development

The Company focuses its research and development efforts on developing new products and core technologies for its access infrastructure markets and further enhancing the functionality, reliability, performance and flexibility of existing products. In 2004, the Company acquired additional expertise in Web-based services, telephony, voice over internet protocol and secure access appliances. The Company solicits extensive input concerning product development from end-users, both directly from end-customers and indirectly through its channel distributors.

The Company believes that its software development team and core technologies represent a significant competitive advantage for the Company. Included in the software development team is a group focused on research activities that include prototyping ways to integrate emerging technologies and standards into the Company’s product offerings, such as emerging Web services technologies and Microsoft’s newest Windows Server technologies. Other groups within the software development team have expertise in XML-based software development, integration of acquired technology, multi-tier Web-based application development and deployment and secure sockets layers-based (“SSL”) secure access. The Company maintains a team working on-site at Microsoft focused on enhancing and adding value to the next generation of Microsoft Windows Server products and operating systems.

The software development team also includes a number of key employees who were instrumental in the release of Microsoft’s Window’s NT 4.0 Terminal Server Edition, have expertise in current Microsoft and UNIX operating system environments (Solaris, AIX, HP-UX, and Linux), and were key members from the engineering team that developed the original version of OS/2 at IBM. During 2004, 2003 and 2002, the Company incurred research and development expenses of approximately $86.4 million, $64.4 million and, $68.9 million, respectively.

Sales, Marketing and Support

The Company markets and licenses its products primarily through multiple channels worldwide, including value added resellers, channel distributors, system integrators (“SI”s) and independent software vendors (“ISV”s), managed by the Company’s worldwide sales force. The Company provides training and certification to integrators, value-added resellers and consultants for a full-range of Citrix-based application deployment and management solutions and services through its accessPARTNER network.

As of December 31, 2004, the Company had relationships with approximately 90 distributors and approximately 4,700 Citrix Solution Advisors worldwide. A number of entities with which the Company has channel relationships provide additional end-customer sales channels for the Company’s products under either a Citrix brand or embedded in the licensee’s own software product. For information regarding entities with which the Company has technology relationships, including Citrix Alliance Partners, see “— Technology Relationships.”

In 2004, the Company established the global network of partners called Citrix accessPARTNER. This network spans the system integrators, value-added distributors, resellers, alliance partners, developers, and certified and education professionals who advise on, sell, implement, and provide training for Citrix products and services. At the core of this community are the Citrix Solution Advisors who deliver strategic and successful access infrastructure solutions to Citrix

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customers. Early in 2004, the Company introduced a new program called Citrix Advisor Rewards designed to reward partners for registering projects, submitting forecasts early in the sales process, and providing value-based solutions around Citrix access infrastructure.

The Company regularly takes actions to improve the effectiveness of and strengthen its channel relationships, including eliminating non-performing partners, adding new partners with expertise in selling into new markets, and forming additional relationships with global and regional SIs and ISVs. During 2004 and 2003, the Company particularly focused on streamlining and simplifying sales processes, improving channel incentive programs to reward solution-selling, and training. The Company combined its existing channel programs, including the Citrix Solutions Network^™, into the Citrix accessPARTNER network, a single, global network that spans the solution advisors, SIs, value-added distributors, resellers, alliance partners, and certified education professionals who advise on, sell, implement and provide training for the Citrix MetaFrame Access Suite and related products and services. At the core of this community are Solution Advisors — value-added resellers who deliver strategic and successful access infrastructure solutions for customers. SIs and ISVs are becoming a more central part of Citrix’s strategy in the large enterprise and government markets. The SI program includes members such as IBM, HP, Computer Sciences Corporation, Electronic Data Systems Corporation, Schlumberger, Siemens and Northrop Grumman. The ISV program has a strong representation from targeted industry verticals such as healthcare, financial services and telecommunications. Members in the ISV program include Amdocs, Cerner, Dell, McKesson, Siemens Medical Health Solutions, Reynolds & Reynolds, ESRI and Ericsson, among others.

The Company’s sales and marketing organization actively supports its distributors and resellers. The Company’s sales organization consists of field-based systems sales engineers and corporate sales professionals. Additional sales personnel, based in North America, Europe, Africa, Asia, Australia and South America, support these field personnel. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Results of Operations” and Note 12 to the Company’s Notes to Consolidated Financial Statements for information regarding the Company’s segments. These additional sales personnel recruit prospective customers, provide technical advice with respect to the Company’s products and work closely with key distributors and resellers of the Company’s products. During 2004 and 2003, the Company grew its sales force of sales professionals that work closely with partners to sell to medium and large enterprise customers to achieve the appropriate combination of relationships for licensing, integration and consulting to meet customers’ needs. These and other account penetration efforts are part of the Company’s strategy to increase the usage of Citrix software within the customer’s IT organization.

The Company’s marketing department provides training, sales event support, sales collateral, advertising, direct mail and public relations coverage to its indirect channels to aid in market development and in attracting new customers. In 2003, the Company launched a multi-million-dollar, worldwide advertising campaign. Beginning September 2003, and extending throughout 2004 and into 2005, this multi-media campaign combines CIO-targeted and customer-focused print, Web, billboard and radio advertisements to raise Citrix’s brand awareness using the CIOs of household-name customers to describe the benefits of becoming an on-demand enterprise with Citrix access infrastructure.

The Company provides most of its distributors with stock balancing and price protection rights. These transactions are estimated and provided for at the time of sale as a reduction of revenue. Stock balancing rights permit distributors to return products to the Company up to the forty-fifth day of the fiscal quarter, subject to ordering an equal dollar amount of other Citrix products prior to the last day of the same fiscal quarter. The Company is not obligated to accept product returns from its distributors under any other conditions, unless the product item is defective in manufacture. Product items returned to the Company under the stock-balancing program must be in new, unused and unopened condition. Price protection rights require that the Company grant retroactive price adjustments for inventories of Citrix products held by distributors or resellers if the Company lowers its prices for such products. In the event that the Company decides to reduce its prices, it will establish a reserve to cover exposure to distributor inventory. The Company has not reduced and has no current plans to reduce the prices of its products for inventory currently held by distributors or resellers. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Critical Accounting Policies” and Note 2 to the Company’s Notes to Consolidated Financial Statements for information regarding the Company’s revenue recognition policy.

Except for the Web-based desktop access services offered by the Citrix Online division, the Company’s other service activities are related to post-sale technical support, pre- and post-sale consulting and product training services. Post-sale technical support is offered through Citrix-operated support centers located in the United States, Ireland, Tokyo and Australia. In most cases, the Company provides technical advice to channel distributors and entities with which the Company has a technology relationship, who act as the first line of technical assistance for end-customers. In some cases, end-customers can also choose from a Citrix-delivered fee-based support program ranging from one-time incident charges

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to an enterprise-level support agreement covering multiple sites and servers. In addition, the Company also provides free technical advice through on-line support systems, including its Web-based “Knowledge Center.” For pre- and post-sale consulting, Citrix Consulting, a consulting services organization, provides both exploratory and fee-based consulting services. These services include on-site systems design and implementation services targeted primarily at enterprise-level clients with complex IT environments. Citrix Consulting is also responsible for the development of best practice knowledge that is disseminated to businesses with which Citrix has a business relationship and end-customers through training and written documentation. Leveraging these best practices enables the Company’s integration resellers to provide more complex systems, reach new buyers within existing customer organizations and provide more sophisticated system proposals to prospective customers. Training services for business, end-customers and partners are provided through the Company’s CALC program and eLearning. CALCs are staffed with instructors that have been certified by Citrix and teach their students using Citrix-developed courseware. Over 300 of the world’s leading IT training organizations are CALCs. eLearning is available through both CALCs and from Citrix’s website.

Operations

The Company controls all purchasing, inventory, scheduling, order processing and accounting functions related to its operations. Production, warehousing and shipping are performed internally in the United States and by independent contractors on a purchase order basis in Ireland, depending upon the customer’s geographic market. Master software CD-ROMs, development of user manuals, packaging designs, initial product quality control and testing are performed at the Company’s facilities. In some cases, independent contractors duplicate CD-ROMs, print documentation, and package and assemble product to the Company’s specifications. To date, the Company has not experienced any material difficulties or delays in the manufacture and assembly of its products. Internal manufacturing capabilities and independent contractors provide a redundant source of manufacture and assembly.

The Company generally ships products upon receipt of an order. As a result, the Company does not have significant backlog at any given time, and does not consider backlog to be a significant indicator of future performance.

Competition

As the markets for the Company’s products continue to develop, additional companies, including Microsoft and other companies with significant market presence in the computer hardware, software and networking industries could enter the markets in which the Company competes and further intensify competition.

In addition, alternative products for secure, remote access in the Internet software and hardware markets directly and indirectly compete with the Company’s current products and anticipated future product offerings. Existing or new products that extend Internet software and hardware to provide Web-based information and application access or interactive computing can materially impact the Company’s ability to sell its products in this market. The Company’s competitors in this market include Cisco, Juniper Networks, Oracle, Sun Microsystems, WebEx Communications, Inc. and other makers of secure remote access solutions.

See “— Technology Relationships” and “Management’s Discussion and Analysis of Financial Conditions and Results of Operations — Certain Factors Which May Affect Future Results.” The announcement of the release, and the actual release, of products competitive to the Company’s existing and future product lines, could cause existing and potential customers of the Company to postpone or cancel plans to license certain of its existing and future product offerings, which would adversely impact the Company’s business, results of operations and financial condition.

Proprietary Technology

The Company’s success is dependent upon certain proprietary technologies and core intellectual property. The Company has been awarded a number of domestic and foreign patents and has a number of pending patent applications in the United States and foreign countries. The Company’s technology is also protected under copyright laws. Additionally, the Company relies on trade secret protection and confidentiality and proprietary information agreements to protect its proprietary technology. The Company has trademarks or registered trademarks in the United States and other countries, including Citrix^®, ICA^®, MetaFrame^®, MetaFrameXP^®, GoToMyPC^®, GoToAssist^TM®, GoToMeeting^TM and the Citrix^® logo.

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While the Company’s competitive position could be affected by its ability to protect its proprietary information, the Company believes that because of the rapid pace of technological change in the industry, factors such as the technical expertise, knowledge and innovative skill of the Company’s management and technical personnel, its technology relationships, name recognition, the timeliness and quality of support services provided by the Company and its ability to rapidly develop, enhance and market software products could be more significant in maintaining the Company’s competitive position. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Certain Factors Which May Affect Future Results.”

Available Information

The Company’s Internet address is http://www.citrix.com. The Company makes available, free of charge, on or through the Company’s website its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements on Form DEF 14A and any amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act as soon as reasonably practicable after such material is electronically filed with or furnished to the SEC.

Employees

As of December 31, 2004, the Company had 2,656 employees. The Company believes its relations with employees are good. In certain countries outside of the United States, the Company’s relations with employees are governed by labor regulations.

ITEM 2.    PROPERTIES

The Company’s corporate offices are located in Fort Lauderdale, Florida. The Company’s corporate offices include leased and subleased office space totaling approximately 461,000 square feet. In addition, the Company leases approximately 142,000 square feet of office space in other locations in the United States and Canada.

The Company leases and subleases a total of approximately 240,000 square feet of office space in various other facilities in Europe, Latin America, the Asia-Pacific region, the Middle East and Africa. In addition, the Company owns land and buildings in the United Kingdom with approximately 48,000 square feet of office space.

ITEM 3.    LEGAL PROCEEDINGS

The Company is a defendant in various litigation matters generally arising out of the normal course of business. Although it is difficult to predict the ultimate outcome of these cases, management believes, based on discussions with counsel, that the ultimate outcome will not materially affect the Company’s business, financial position, results of operations or cash flows.

ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None.

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PART II

Price Range of Common Stock and Dividend Policy

The Company’s common stock is currently traded on The Nasdaq National Market under the symbol “CTXS.” The following table sets forth the high and low closing prices for the Company’s common stock as reported on The Nasdaq National Market for the periods indicated, as adjusted to the nearest cent. Such information reflects inter-dealer prices, without retail markup, markdown or commission and may not represent actual transactions.

On March 8, 2005 the last reported sale price of the Company’s common stock on The Nasdaq National Market was $23.70 per share. As of March 8, 2005, there were approximately 1,141 holders of record of the Company’s common stock.

The Company currently intends to retain any earnings for use in its business, for investment in acquisitions and to repurchase shares of its common stock. The Company does not currently anticipate paying any cash dividends on its capital stock in the foreseeable future.

Equity Compensation Plan Information

See Part III, Item 12 for information regarding securities authorized for issuance under the Company’s equity compensation plans.

Issuer Purchases of Equity Securities

The Company’s Board of Directors has authorized an ongoing stock repurchase program with a total repurchase authority granted to the Company of $1.0 billion, of which $200 million was authorized in February 2005. The objective of the stock repurchase program is to manage actual and anticipated dilution and to improve shareholders’ returns. At December 31, 2004, approximately $42.0 million was available to repurchase common stock pursuant to the stock repurchase program. All shares repurchased are recorded as treasury stock. The following table shows the monthly activity related to the Company’s stock repurchase program for the three month period ending December 31, 2004:

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ITEM 6.    SELECTED CONSOLIDATED FINANCIAL DATA

The following selected consolidated financial data should be read in conjunction with the Consolidated Financial Statements and Notes thereto and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” appearing elsewhere in this Annual Report on Form 10-K.

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Overview

We design, develop and market access infrastructure software, services and appliances. We market and license our products through multiple channels such as value-added resellers, channel distributors, system integrators, independent software vendors and our websites. We also promote our products through relationships with a wide variety of industry participants, including Microsoft Corporation (“Microsoft”).

Acquisitions

Net6

On December 8, 2004, we acquired all of the issued and outstanding capital stock of Net6, Inc. or Net6, a leader in providing secure access gateways. The acquisition extends our ability to provide easy and secure access to virtually any resource, both data and voice, on-demand. The results of operations of Net6 are included in our results of operations beginning after December 8, 2004 as part of our Americas geographic segment. The consideration for this transaction was approximately $49.2 million paid in cash. In addition to the purchase price, there were direct transaction costs associated with the acquisition of approximately $1.7 million. The sources of funds for consideration paid in this transaction consisted of available cash and investments.

Expertcity

On February 27, 2004, we acquired all of the issued and outstanding capital stock of Expertcity.com, Inc. or Expertcity, a market leader in Web-based desktop access as well as a leader in Web-based training and customer assistance products. The results of operations of Expertcity are included in our results of operations beginning after February 27, 2004.

The consideration for this transaction was approximately $241.4 million, comprised of approximately $112.6 million in cash, approximately 5.9 million shares of our common stock valued at approximately $124.4 million and direct transaction costs of approximately $4.4 million. These amounts include additional common stock earned by Expertcity upon the achievement of certain revenue and other financial milestones during 2004 pursuant to the merger agreement, which will be issued during 2005. The fair value of the common stock earned as additional purchase price consideration was recorded as goodwill on the date earned. The sources of funds for consideration paid in this transaction consisted of available cash and investments and our authorized common stock. There is no further contingent consideration related to the transaction.

Purchase Accounting for Our Acquisitions

Under the purchase method of accounting, the purchase price was allocated to Expertcity’s and Net6’s respective net tangible and intangible assets based on their estimated fair values. Independent valuation specialists assisted us in determining the fair values of a significant portion of the net assets associated with these transactions.

The allocation of the purchase price is summarized below (in thousands):

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Net assets acquired from Expertcity consisted mainly of cash and investments, accounts receivable, deferred revenues and other current liabilities. Net liabilities acquired from Net6 consisted mainly of cash, accounts receivable, deferred revenues and other current and long-term liabilities.

Intangible assets acquired in the Expertcity acquisition are comprised of core and product technologies, trade names, covenants not to compete and customer relationships. Intangible assets acquired in the Net6 acquisition are comprised of core and product technologies, customer relationships and covenants not to compete. The goodwill recorded in relation to these acquisitions is not deductible for tax purposes. The valuation of the trade names for Expertcity was determined based on assigning a royalty rate to the revenue stream that was expected from the services using the trade name. The pre-tax royalty rate was applied to the product revenue and discounted to a present value. The valuation of core and product technology was based on the estimated discounted future cash flows associated with Expertcity’s and Net6’s existing products. The value of customer relationships was determined based on Expertcity’s and Net6’s estimated future discounted cash flows of the relationships in place after considering historical attrition rates.

We expensed purchased in–process research and development of approximately $18.7 million related to the Expertcity acquisition and $0.4 million related to the Net6 acquisition immediately upon the closing of the mergers. For more information regarding the in-process research and development acquired from Expertcity, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Results of Operations” and note 3 to our consolidated financial statements.

Critical Accounting Policies and Estimates

Our discussion and analysis of financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent liabilities. We base these estimates on our historical experience and on various other assumptions that we believe to be reasonable under the circumstances, and these estimates form the basis for our judgments concerning the carrying values of assets and liabilities that are not readily apparent from other sources. We periodically evaluate these estimates and judgments based on available information and experience. Actual results could differ from our estimates under different assumptions and conditions. If actual results significantly differ from our estimates, our financial condition and results of operations could be materially impacted.

We believe that the accounting policies described below are critical to understanding our business, results of operations and financial condition because they involve more significant judgments and estimates used in the preparation of our consolidated financial statements. An accounting policy is deemed to be critical if it requires an accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, and if different estimates that could have been used, or changes in the accounting estimates that are reasonably likely to occur periodically, could materially impact our consolidated financial statements. We have discussed the development, selection and application of our critical accounting policies with the audit committee of our board of directors, and our audit committee has reviewed our disclosure relating to our critical accounting policies in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Other significant accounting policies, primarily those with lower levels of uncertainty than those discussed below, are also critical to understanding our consolidated financial statements. The notes to our consolidated financial statements contain additional information related to our accounting policies and should be read in conjunction with this discussion.

Revenue Recognition.    The accounting related to revenue recognition in the software industry is complex and affected by interpretations of the rules and an understanding of industry practices, both of which are subject to change. As a result, revenue recognition accounting rules require us to make significant judgments. In addition, our judgment is required in assessing the probability of collection, which is generally based on evaluation of customer-specific information, historical collection experience and economic market conditions.

We sell most of our MetaFrame Access Suite products bundled with an initial subscription for software license updates that provide the end-user with free enhancements and upgrades to the licensed product on a when and if available basis. Customers may also elect to purchase technical support, product training or consulting services. We allocate revenue to software license updates and any other undelivered elements of the arrangement based on vendor specific objective

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evidence, or VSOE, of fair value of each element and such amounts are deferred until the applicable delivery criteria and other revenue recognition criteria have been met. The balance of the revenue, net of any discounts inherent in the arrangement, is allocated to the delivered software product using the residual method and recognized at the outset of the arrangement as the software licenses are delivered. If we cannot objectively determine the fair value of each undelivered element based on VSOE, we defer revenue recognition until all elements are delivered, all services have been performed, or until fair value can be objectively determined. We must apply judgment in determining all elements of the arrangement and in determining the VSOE of fair value for each element, considering the price charged for each product or applicable renewal rates for software license updates.

In the normal course of business, we do not permit product returns, but we do provide most of our distributors and value added resellers with stock balancing and price protection rights. Stock balancing rights permit distributors to return products to us up to the forty-fifth day of the fiscal quarter, subject to ordering an equal dollar amount of our other products prior to the last day of the same fiscal quarter. Price protection rights require that we grant retroactive price adjustments for inventories of our products held by distributors or resellers if we lower our prices for such products. We establish provisions for estimated returns for stock balancing and price protection rights, as well as other sales allowances, concurrently with the recognition of revenue. The provisions are established based upon consideration of a variety of factors, including, among other things, recent and historical return rates for both specific products and distributors, estimated distributor inventory levels by product, the impact of any new product releases and projected economic conditions. Actual product returns for stock balancing and price protection provisions incurred are, however, dependent upon future events, including the amount of stock balancing activity by our distributors and the level of distributor inventories at the time of any price adjustments. We continually monitor the factors that influence the pricing of our products and distributor inventory levels and make adjustments to these provisions when we believe actual returns and other allowances could differ from established reserves. Our ability to recognize revenue upon shipment to our distributors is predicated on our ability to reliably estimate future stock balancing returns. If actual experience or changes in market condition impairs our ability to estimate returns, we would be required to defer the recognition of revenue until the delivery of the product to the end-user. Allowances for estimated product returns amounted to approximately $2.3 million at December 31, 2004 and $3.0 million at December 31, 2003. The decrease in allowances for estimated product returns is a reflection of the decrease in stock rotation experience primarily due to a reduction in packaged product inventory held by our distributors resulting from an increase in enterprise customer license arrangements, which are typically delivered electronically. We have not reduced and have no current plans to reduce our prices for inventory currently held by distributors or resellers. Accordingly, there were no reserves required for price protection at December 31, 2004 or December 31, 2003. We also record reductions to revenue for customer programs and incentive offerings including volume-based incentives, at the time the sale is recorded. If market conditions were to decline, we could take actions to increase our customer incentive offerings, which could result in an incremental reduction to our revenue at the time the incentive is offered.

Core and Product Technology Assets.    We review acquired core and product technology assets for impairment on a periodic basis by comparing the estimated net realizable value to the unamortized cost of the technology. We have acquired our core and product technology assets primarily from our Net6, Expertcity and Sequoia acquisitions as well as under other third party agreements. The core and product technology assets acquired in our Net6 acquisition will extend our ability to provide easy and secure access through our MetaFrame Access Suite of products. The core and product technology assets acquired in our Expertcity acquisition form the basis of our Citrix Online division and the assets acquired in our Sequoia acquisition, as well as under other third party agreements, form the basis for our MetaFrame Secure Access Manager product. The recoverability of these technologies is primarily dependent upon our ability to commercialize these products. The estimated net realizable value of the purchased Sequoia and other technology is based on the estimated undiscounted future cash flows associated with our MetaFrame Secure Access Manager. The estimated net realizable value of the purchased Expertcity technology is based on the estimated undiscounted future cash flows associated with our Citrix Online services. Our revenues are forecasted based on historical sales, data received from rate projections on our subscribing customer base and estimates from our sales channels and end-customer sales force. Our assumptions about future revenues and expenses require significant judgment associated with the forecast of MetaFrame Secure Access Manager and our Citrix Online products. Actual revenues and costs could vary significantly from these forecasted amounts. As of December 31, 2004, the estimated undiscounted future cash flows expected from core and product technology assets from these acquisitions is sufficient to recover their carrying value. If these products are not ultimately accepted by our customers, and there is no alternative future use for this technology, we could determine that some or all of their remaining $36.3 million carrying value is impaired. In the event of impairment, we would record an impairment charge to earnings that could have a material adverse effect on our results of operations.

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On December 8, 2004, we acquired Net6, which resulted in additional core and product technology of $13.3 million, net of amortization, at December 31, 2004. For more information concerning our acquisition of Net6, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Acquisitions.”

Goodwill.    At December 31, 2004, we had $361.5 million in goodwill primarily related to our acquisitions of Net6, Expertcity and Sequoia. The goodwill recorded in relation to these acquisitions is not deductible for tax purposes. We operate in a single market consisting of the design, development, marketing and support of access infrastructure software, hardware and services for enterprise applications. Our revenues are derived from sales in the Americas, Europe, the Middle East and Africa, or EMEA, and Asia-Pacific regions and from our Citrix Online division. These three geographic regions and the Citrix Online division constitute our reportable segments. See note 12 to our consolidated financial statements for additional information regarding our reportable segments. We evaluate goodwill along these segments, which represent our reporting units. Substantially all of our goodwill at December 31, 2004 was associated with our Americas and Citrix Online reportable segments.

On January 1, 2002, we adopted Statement of Financial Accounting Standard or SFAS No. 142, Goodwill and Other Intangible Assets. As a result of adopting SFAS No. 142, our goodwill is no longer amortized but is subject to an annual impairment test. In accordance with SFAS No. 142, we ceased amortizing goodwill with a net book value at January 1, 2002 of $152.4 million, including $10.1 million of acquired workforce previously classified as purchased intangible assets. Excluding goodwill, we have no intangible assets deemed to have indefinite lives.

We use judgment in assessing goodwill for impairment. Goodwill is reviewed for impairment annually, or sooner if events or changes in circumstances indicate that the carrying amount could exceed fair value. Fair values are based on discounted cash flows using a discount rate determined by our management to be consistent with industry discount rates and the risks inherent in our current business model. In accordance with SFAS No. 142, we completed the required impairment tests of goodwill at the date of adoption and annually as required. There were no impairment charges recorded as a result of the adoption of SFAS No. 142 or annual impairment tests. Due to uncertain market conditions and potential changes in our strategy and product portfolio, it is possible that the forecasts we use to support our goodwill could change in the future, which could result in non-cash charges that would adversely affect our results of operations and financial condition.

Current and Deferred Tax Assets.    We are required to estimate our income taxes in each of the jurisdictions in which we operate as part of the process of preparing our consolidated financial statements. At December 31, 2004, the Company has $40.8 million in net deferred tax assets. SFAS No. 109, Accounting for Income Taxes, requires a valuation allowance to reduce the deferred tax assets reported if, based on the weight of the evidence, it is not more likely than not that some portion or all of the deferred tax assets will be realized. Management reviews deferred tax assets periodically for recoverability and makes estimates and judgments regarding the expected geographic sources of taxable income, gains from investments, as well as tax planning strategies in assessing the need for a valuation allowance. At December 31, 2004, we determined that a valuation allowance of approximately $1.3 million relating to foreign tax credit carryovers was necessary to reduce our deferred tax assets to the amount that will more likely than not be realized. If the estimates and assumptions used in our determination change in the future, we could be required to revise our estimates of the valuation allowances against our deferred tax assets and adjust our provisions for additional income taxes.

In the ordinary course of global business, there are transactions for which the ultimate tax outcome is uncertain, thus judgment is required in determining the worldwide provision for income taxes. We provide for income taxes on transactions based on our estimate of the probable liability. We adjust our provision as appropriate for changes that impact our underlying judgments. Changes that impact provision estimates include such items as jurisdictional interpretations on tax filing positions based on the results of tax audits and general tax authority rulings. Due to the evolving nature of tax rules combined with the large number of jurisdictions in which we operate, it is possible that our estimates of our tax liability and the realizability of our deferred tax assets could change in the future, which may result in additional tax liabilities and adversely affect our results of operations, financial condition and cash flows.

Stock-based Compensation Disclosures

Our stock option program is a broad based, long-term retention program that is intended to attract and reward talented employees and align stockholder and employee interests. The number and frequency of stock option grants are based on competitive practices, our operating results, the number of options available for grant under our shareholder approved plans, and other factors. All employees are eligible to participate in the stock option program.

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As of December 31, 2004, we had six stock-based compensation plans, including plans assumed in acquisitions. We typically grant stock options for a fixed number of shares to employees with an exercise price equal to or above the market value of the shares at the date of grant. As discussed in note 2 to our consolidated financial statements, we apply the intrinsic value method under Accounting Principles Board or APB Opinion No. 25, Accounting for Stock Issued to Employees, and related interpretations in accounting for our plans except for 51,546 options assumed as part of the Net6 acquisition, which were accounted for in with FASB Interpretation No. 44, Accounting for Certain Transactions Involving Stock Compensation (an Interpretation of APB Opinion No. 25) because they had an exercise price below market value. No stock-based compensation cost has been reflected in net income except for the amounts related to the 51,546 options assumed as part of the Net6 acquisition. The impact of our fixed stock plans and our stock purchase plan on our consolidated financial statements from the use of options is reflected in the calculation of earnings per share in the form of dilution.

The following table (in thousands, except option price) provides information as of December 31, 2004 about the securities authorized for issuance to our employees and directors under our fixed stock compensation plans, consisting of our Amended and Restated 1995 Stock Plan, the Third Amended and Restated 1995 Employee Stock Purchase Plan, the Amended and Restated 1995 Non-Employee Director Option Plan and the Second Amended and Restated 2000 Director and Officer Stock Option and Incentive Plan:

The following table provides information about stock options granted in 2004 and 2003 for employees, non-employee directors and for certain executive officers. The stock option data for listed officers relates to our Named Executive Officers. The “Named Executive Officers” for the year ended December 31, 2004, consist of our chief executive officer and the four other most highly compensated executive officers who earned total annual salary and bonus in excess of $100,000 in 2004. For further information on 2004 Named Executive Officers, see our 2004 proxy statement that will be filed with the Securities and Exchange Commission not later than 120 days after the close of our fiscal year ended December 31, 2004. For 2003, the “Named Executive Officers” consist of our chief executive officer and the four other most highly compensated executive officers and one other individual that would have qualified, except that she was not an executive officer at December 2003 that earned total annual salary and bonus in excess of $100,000 in 2003. The 2003 Named Executive Officers are identified in our 2003 Proxy Statement dated April 4, 2004. Named Executive officers for both years presented were employees as of the respective year end.

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The following table presents our option activity from December 31, 2002 through December 31, 2004 (in thousands, except weighted-average exercise price). Some amounts may not add due to rounding.

A summary of our in-the-money and out-of-the-money option information as of December 31, 2004 is as follows (in thousands, except weighted average exercise price). Out-of-the-money options are those options with an exercise price equal to or above the closing price of $24.46 per share for our common stock at December 31, 2004.

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The following table provides information with regard to our stock option grants during 2004 to the 2004 Named Executive Officers:

The following table presents certain information regarding option exercises for 2004 and outstanding options held by 2004 Named Executive Officers as of December 31, 2004:

For further information regarding our stock option plans, see note 6 to our consolidated financial statements.

The following discussion relating to the individual financial statement captions, our overall financial performance, operations and financial position should be read in conjunction with the factors and events described in “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Overview” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Certain Factors Which May Affect Future Results,” which could impact our future performance and financial position.

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Results of Operations

The following table sets forth our consolidated statements of income data and presentation of that data as a percentage of change from period-to-period.

Net Revenues.    Our operations consist of the design, development, marketing and support of access infrastructure software and services that enable effective and efficient enterprise-wide deployment and management of applications and information.

Net revenues include the following categories: Software Licenses, Software License Updates, Services, and Other. Software Licenses primarily represents fees related to the licensing of our MetaFrame Access Suite products. These revenues are reflected net of sales allowances and provisions for stock balancing return rights. The MetaFrame Presentation Server product accounted for approximately 93.3% of our Software License revenue for the year ended December 31, 2004, 97.6% of our Software License revenue for the year ended December 31, 2003 and 97.7% of our Software License revenue for the year ended December 31, 2002. Software License Updates consists of fees related to our Subscription Advantage program (our terminology for post contract support) that are recognized ratably over the term of the contract, which is typically 12 to 24 months. Subscription Advantage is an annual renewable program that provides subscribers with automatic delivery of software upgrades, enhancements and maintenance releases when and if they become available during the term of the subscription. Services consist primarily of technical support services and Web-based desktop access services revenue recognized ratably over the contract term, revenue from product training and certification, and consulting services revenue related to implementation of our software products, which are recognized as the services are provided. In May 1997, we entered into a five-year joint license, development and marketing agreement with the Microsoft Corporation or the Microsoft Development Agreement, which expired in May 2002. Other revenues in 2002 represents the royalty fees recognized in connection with the Microsoft Development Agreement.

Net revenues increased $152.5 million during 2004 compared to 2003. Software License revenue decreased $4.6 million during 2004 primarily due to a weakness in our packaged product sales which are typically purchased by medium and small-sized businesses. Software License Updates revenue increased $102.8 million during 2004 primarily due to a larger base of subscribers and increasing renewal rates related to our Subscription Advantage program. Services revenue increased

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$54.4 million during 2004 primarily due to the addition of the Citrix Online division resulting from our February 2004 Expertcity acquisition. We currently expect Subscription Advantage to continue to be of strategic importance to our business in 2005 because it fosters long-term customer relationships and gives us improved visibility and predictability due to the recurring nature of this revenue stream.

In January 2004, we launched our Advisor Rewards Program which gives sales incentives to resellers for the sale of certain license types. In the third quarter of 2004, we extended our Advisor Rewards Program to a broader range of license types, which we anticipate will continue to stimulate demand for our MetaFrame products from smaller customers and projects. Revenues associated with our Advisor Rewards Program is partially offset by the associated incentives to our resellers.

Net revenues increased $61.2 million during 2003 compared to 2002. Software License revenue increased $11.3 million during 2003 primarily due to an increase in Software Licenses, revenue from the sale of Citrix MetaFrame Presentation Server, under enterprise customer license arrangements. Also, the increase over 2002 was partially due to weakness during 2002 in packaged product sales to our distributors and resellers, associated with a reduction in packaged product inventory held by our distributors and overall weakness in IT spending during 2002. Software License Updates revenue increased $63.1 million during 2003 compared to 2002 primarily due to the continued acceptance of our renewable Subscription Advantage program. These increases were partially offset by a decrease in Other revenue of $14.1 million during 2003 associated with the expiration of the Microsoft Development Agreement in May 2002.

Deferred revenues, primarily related to Citrix Subscription Advantage and Services revenues, increased approximately $60.1 million compared to December 31, 2003. The significant increase was due primarily to increased renewals of Citrix Subscription Advantage, and the services sold by our Citrix Online division, which were acquired from Expertcity. We expect deferred revenue to increase in 2005 due primarily to currently expected increases in both annual contract adoptions for Citrix Online services and Subscription Advantage renewals.

International and Segment Revenues.    International revenues (sales outside of the United States) accounted for approximately 53.2% of our net revenues for the year ended December 31, 2004, 54.6% of our net revenues for the year ended December 31, 2003, and 53.7% of our net revenues for the year ended December 31, 2002.

An analysis of our reportable segment net revenue is presented below:

With respect to our segment revenues, the increase in net revenues during 2004 as compared to 2003 was due primarily to the factors mentioned above across all geographic segments, particularly Europe. The increase in net revenues during 2003 as compared to 2002 was due primarily to the factors mentioned above across all geographic segments. For additional information on international revenues, please refer to note 12 to our consolidated financial statements.

Cost of Revenues.    Cost of revenues consists primarily of the compensation costs and other personnel-related costs of providing services and amortization of core and product technology, as well as costs of product media and duplication, manuals, packaging materials and shipping expense service capacity costs and royalties. Cost of software licenses revenues decreased $9.7 million in 2004 as compared to 2003 due primarily to a decrease in royalties due to the expiration of certain

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license agreements. Cost of services revenues increased $10.0 million in 2004 compared to 2003 primarily due to the addition of our Citrix Online division resulting from the February 2004 Expertcity acquisition. Amortization of core and product technology decreased $4.9 million in 2004 as compared to 2003 primarily due to the reclassification of certain intangible tax assets related to a 2001 acquisition from a product technology intangible asset to goodwill resulting in an approximately $7.2 million reduction in amortization expense partially offset due to an increase in amortization expense related to core and product technology intangible assets acquired in the Expertcity acquisition. Cost of revenues for software licenses revenues, cost of services revenues and amortization of core and product technology for 2003 remained relatively unchanged compared to 2002.

Gross Margin.    Gross margin as a percent of revenue was 96.4% for 2004, 94.7% for 2003 and 94.3% for 2002. The increase in gross margin as a percentage of net revenue in 2004 compared to 2003 was primarily due to the decrease in cost of revenues as discussed above. We currently anticipate that in the next twelve months, gross margin as a percentage of net revenues will remain relatively unchanged as compared with current levels. Gross margin, however, will fluctuate from time to time based on a number of factors attributable to the cost of revenues as discussed above.

Operating Expenses.    As further discussed below, during 2002 we reduced our worldwide workforce by approximately 10% (approximately 200 employees) and consolidated certain functions from our Salt Lake City, Utah and Columbia, Maryland facilities into our Fort Lauderdale, Florida facility. As a result of such actions, we incurred expenses of approximately $10.9 million, primarily for severance and related facility expenses, of which approximately $7.0 million were included in research and development expenses, $2.8 million were included in sales, marketing and support expenses and $1.1 million were included in general and administrative expenses.

Our results of operations are subject to fluctuations in foreign currency exchange rates. In order to minimize the impact on our operating results, we generally initiate our hedging of currency exchange risks one year in advance of anticipated foreign currency expenses. As a result of this policy, foreign currency denominated expenses will be higher or lower in the current year depending on the weakness or strength of the dollar in the prior year. Since the U.S. dollar was generally weak in 2004, we currently expect that operating expenses will be higher in 2005 but further dollar weakness in 2005 will not have a further material adverse impact on our operating expenses until 2006.

As permitted by SFAS No. 123, Accounting for Stock-based Compensation, we currently account for share-based payments to employees using the APB Opinion No. 25 intrinsic value method and, as such, generally recognize no compensation cost for employee stock options. In December 2004, the Financial Accounting Standards Board issued SFAS No. 123R, Share-Based Payment. SFAS No. 123R requires companies to expense the value of employee stock options and similar awards. SFAS No. 123R permits public companies to adopt its requirements using one of two methods: A “modified prospective” method in which compensation cost is recognized beginning with the effective date (a) based on the requirements of SFAS No. 123R for all share-based payments granted after the effective date and (b) based on the requirements of SFAS No. 123R for all awards granted to employees prior to the effective date of SFAS No. 123R that remain unvested on the effective date. A “prospective” method which includes the requirements of the modified prospective method described above, but also permits entities to restate based on the amounts previously recognized under SFAS No. 123R for purposes of pro forma disclosures either (a) all prior periods presented or (b) prior interim periods of the year of adoption. SFAS No. 123R also requires the benefits of tax deductions in excess of recognized compensation cost to be reported as a financing cash flow, rather than as an operating cash flow as required under current literature. SFAS No. 123R also requires the benefits of tax deductions in excess of recognized compensation cost to be reported as a financing cash flow, rather than as an operating cash flow as required under current literature. We are currently in the process of determining the effects on our financial position, results of operations and cash flows that will result from the adoption of SFAS No. 123R.

Research and Development Expenses.    Research and development expenses consist primarily of personnel-related costs. We expense substantially all development costs included in the research and development of software products and enhancements to existing products as incurred except for certain core technologies with alternative future use. Research and development expenses increased approximately $21.9 million during 2004 as compared to 2003 primarily due to increased headcount and related personnel costs, as well as an increase in staffing and associated personnel costs related to the Expertcity acquisition. During 2005, we expect research and development expenses to increase as we continue to make investments in our business and hire personnel to achieve our product development goals.

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Research and development expenses decreased approximately $4.5 million during 2003 as compared to 2002, primarily due to severance, relocation and reduced headcount costs and related facility charges associated with the consolidation of our Salt Lake City, Utah and Columbia, Maryland development teams into our remaining engineering facilities in Fort Lauderdale, Florida during 2002. These decreases were partially offset by an increase in costs for external consultants and developers.

Sales, Marketing and Support Expenses.    Sales, marketing and support expenses increased approximately $84.8 million during 2004 as compared to 2003, primarily due to the hiring of additional sales personnel and related personnel costs and increases in commissions and other variable compensation costs due to the achievement of targeted sales goals and an increase in staffing and associated personnel costs related to the Expertcity acquisition. In addition, there was an increase in marketing program costs resulting from our worldwide brand awareness and advertising campaign and from the marketing of services related to our Citrix Online division, which were introduced in the first quarter of 2004. These increases were partially offset by an increase in the allocation of certain revenue generating services expenses from operating expense to cost of services revenues. During 2005, we currently expect sales, marketing and support expenses to increase as we continue to make investments in our business to achieve our strategic goals.

Sales, marketing and support expenses increased approximately $17.4 million during 2003 as compared to 2002 primarily due to increases in commissions and other variable compensation costs due to the achievement of targeted sales goals. In addition and to a lesser extent, the increase in marketing program costs resulted primarily from our launch of a worldwide brand awareness and advertising campaign and increases in product training costs and reseller commissions associated with the increase in our software license updates.

General and Administrative Expenses.    General and administrative expenses increased approximately $20.8 million during 2004 as compared to 2003 primarily due to an increase in external consulting and services associated with regulatory compliance requirements and information systems, an increase in headcount and related personnel costs as well as an increase in staffing and associated personnel costs related to the Expertcity acquisition.

General and administrative expenses decreased approximately $3.3 million during 2003 as compared to 2002 due primarily to a decrease in depreciation expense resulting from asset maturities and the abandonment of certain leasehold improvements during 2002 and a decrease in our provision for doubtful accounts. These decreases were partially offset by an increase in incentive compensation resulting from the achievement of our financial targets and an increase in insurance costs.

Amortization of Other Intangible Assets.    Amortization of other intangible assets increased approximately $5.9 million in 2004 as compared to 2003 primarily due to an increase in amortization expense related to intangible assets acquired in the Expertcity acquisition. As of December 31, 2004, we had unamortized other identified intangible assets with estimable useful lives in the net amount of $29.4 million. Amortization of intangible assets remained relatively unchanged in 2003 compared to 2002. Amortization expense totaled $6.2 million during 2004, $0.3 million during 2003 and $0.5 million in 2002. We currently expect amortization expense to increase during 2005 as a result of our acquisitions. For more information regarding the Net6 and Expertcity acquisitions see, “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Acquisitions” and note 3 to our consolidated financial statements.

In-Process Research and Development.    During 2004, we acquired Expertcity and Net6 and an aggregate of approximately $19.1 million of the respective purchase prices were allocated to in-process research and development, or IPR&D. The amounts allocated to IPR&D had not yet reached technological feasibility, had no alternative future use and were written off at the date of the acquisitions in accordance with Financial Accounting Standards Board Interpretation No. 4, Applicability of FASB Statement No. 2 to Business Combinations Accounted for by the Purchase Method. There were no write-offs of IPR&D during 2003 and 2002. For more information regarding the acquisitions, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Acquisitions” and note 3 to our consolidated financial statements.

Our efforts with respect to the acquired technologies currently consist of design and development that may be required to support the release of the technologies into updated versions of existing service offerings and potentially new product and service offerings by our Citrix Online division. We currently expect that we will successfully develop new products or services utilizing the acquired in-process technology, but there can be no assurance that commercial viability of future product or service offerings will be achieved. Furthermore, future developments in the software industry, changes in

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