Rule 424(b)(3) Registration No. 333-65831 SUNGARD/R/ DATA SYSTEMS INC. SUPPLEMENT DATED DECEMBER 14, 1998 TO PROSPECTUS DATED NOVEMBER 24, 1998 This supplement provides new and additional information beyond that contained in the Prospectus and should be retained and read in conjunction with such Prospectus. Under the caption "SELLING STOCKHOLDERS," the line item regarding Abraham George is amended and restated as follows: # of Shares # of Shares # of Shares % of Shares Owned Before Being Offered Owned After Owned After Name of Selling Stockholder the Offering For Sale the Offering the Offering - ------------------------------------- ------------ ------------- ------------ ----------- Abraham George....................... 184,785 184,785 0 * Mary Fusco........................... 9,000 9,000 0 *