<PAGE>
Rule 424(b)(3)
Registration No. 333-65831
SUNGARD/R/ DATA SYSTEMS INC.
SUPPLEMENT DATED DECEMBER 16, 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:
<TABLE>
<CAPTION>
# 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
- ------------------------------------- --------------- ------------- ------------ ------------
<S> <C> <C> <C> <C>
Abraham George....................... 183,944 183,944 0 *
Adrian Ledger........................ 841 841 0 *
</TABLE>
