EXHIBIT 99.1


          Citrix Appoints Asiff Hirji to Board of Directors;
      TD AMERITRADE Chief Operating Officer to Join Citrix Board

    FORT LAUDERDALE, Fla.--(BUSINESS WIRE)--May 22, 2006--Citrix
Systems, Inc. (Nasdaq:CTXS), the global leader in access
infrastructure solutions, today announced the appointment of a new
director, Asiff Hirji, chief operating officer for TD AMERITRADE
(Nasdaq:AMTD) to its board of directors.
    Hirji, TD AMERITRADE's chief operating officer, oversees the
company's technology, operations, and business development functions.
He is one of four members of the executive management team serving in
the Office of the Chief Executive. Hirji joined TD AMERITRADE in April
2003 serving as chief information officer and leading the technology
integration during the company's merger with Datek. Hirji has nearly
twenty years experience at the nexus of financial services and
technology serving in numerous high-profile positions including leader
of Bain & Company's IT Strategy practice, president and chief
technology officer for Netfolio, Inc., an online investment advisor,
and as a founding member and partner of the financial services
strategic consultancy, Mitchell Madison Group.
    "His executive experience managing and growing large-scale
financial services operations will bring a unique perspective to the
Citrix board of directors," said Mark Templeton, president and chief
executive officer for Citrix. "We are honored to have Asiff joining
the board at such an exciting time in Citrix's evolution."
    Hirji will replace John W. White, a long-time director who has
decided to retire from the Citrix board. White served as a board
member since 1998.
    "John has made invaluable contributions to the company during his
tenure as board director. Citrix owes him a tremendous debt of
gratitude for his dedication and accomplishments. We wish him the best
in all his future endeavors," Templeton said.
    With the election of Hirji, Citrix's board of directors now
includes: Thomas Bogan, former president and chief operating officer,
Rational Software; Murray Demo, chief financial officer, Adobe;
Stephen Dow, general partner, Sevin Rosen Funds; Gary Morin, former
executive vice president and chief financial officer, Lexmark; Godfrey
Sullivan, president and chief executive officer, Hyperion; and Mark
Templeton, president and chief executive officer, Citrix Systems.
    Hirji will serve on the Audit Committee, Finance Committee, and
the Nominating and Corporate Governance Committee.

    About Citrix

    Citrix Systems, Inc. (Nasdaq:CTXS) is the global leader and most
trusted name in on-demand access. More than 180,000 organizations
around the world rely on Citrix to provide the best possible access
experience to any application for any user. Citrix customers include
100% of the Fortune 100 companies and 98% of the Fortune Global 500,
as well as hundreds of thousands of small businesses and individuals.
Citrix has approximately 6,200 channel and alliance partners in more
than 100 countries. Citrix annual revenues in 2005 were $909 million.
Learn more at http://www.citrix.com.

    For Citrix Investors

    This release contains forward-looking statements which are made
pursuant to the safe harbor provisions of Section 21E of the
Securities Exchange Act of 1934. The forward-looking statements in
this release do not constitute guarantees of future performance. Those
statements involve a number of factors that could cause actual results
to differ materially, including risks associated with revenue growth
and recognition of revenue, products, their development and
distribution, product demand and pipeline, economic and competitive
factors, the Company's key strategic relationships, acquisition and
related integration risks as well as other risks detailed in the
Company's filings with the Securities and Exchange Commission. Citrix
assumes no obligation to update any forward-looking information
contained in this press release or with respect to the announcements
described herein.

    Citrix(R) is a registered trademark of Citrix Systems, Inc. in the
U.S. and other countries. TD AMERITRADE Holding Corporation, through
its brokerage subsidiaries, provides investment products and services
to individual investors. TD AMERITRADE and Citrix Systems, Inc. are
separate, unaffiliated companies and are not responsible for each
other's services or policies. All other trademarks and registered
trademarks are property of their respective owners.

    CONTACT: Citrix Systems, Inc., Fort Lauderdale
             Media Inquiries:
             Eric Armstrong, 954-267-2977
             eric.armstrong@citrix.com
             or
             Investor Inquiries:
             Jeff Lilly, 954-267-2886
             jeff.lilly@citrix.com