POWER OF ATTORNEY

       The undersigned, Christopher T. O'Malley, hereby constitutes and appoints
Kenneth V. Handal, Amy Fliegelman Olli, C.H.R. DuPree, and Donald H. Kronenberg,
signing singly, as the undersigned's true and lawful attorney-in-fact to:

(1)    execute for and on behalf of the undersigned, in the undersigned's
       capacity as an officer and/or director of CA, Inc. (the "Company"),
       Form ID and Forms 3, 4, and 5, and such other forms as may be required
       to be filed, in accordance with Section 16(a) of the Securities Exchange
       Act of 1934 and the rules thereunder (each a "Section 16 Form");

(2)    do and perform any and all acts for and on behalf of the undersigned
       which may be necessary or desirable to complete and execute any such
       Section 16 Form, complete and execute any amendment or amendments
       thereto, and file such forms with the United States Securities and
       Exchange Commission and any stock exchange or similar authority; and

(3)    take any other action of any type whatsoever in connection with the
       foregoing which, in the opinion of such attorney-in-fact, may be of
       benefit to, in the best interest of, or legally required by, the
       undersigned, it being understood that the documents executed by such
       attorney-in-fact on behalf of the undersigned pursuant to this Power of
       Attorney shall be in such form and shall contain such terms and
       conditions as such attorney-in-fact may approve in such
       attorney-in-fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

       This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any Section 16 Form with respect to
the undersigned's holdings of and transactions in the securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact. This Power of Attorney supersedes any Power
of Attorney executed by the undersigned relating to the authority to execute and
deliver Section 16 Forms in the undersigned's capacity as an officer and/or
director of the Company.

       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed on June 13, 2008.


                                             /s/ Christopher T. O'Malley
                                             ---------------------------
                                             Christopher T. O'Malley