<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 6,665 <SECURITIES> 31,467 <RECEIVABLES> 23,097 <ALLOWANCES> (784) <INVENTORY> 455 <CURRENT-ASSETS> 69,538 <PP&E> 13,389 <DEPRECIATION> (6,196) <TOTAL-ASSETS> 101,922 <CURRENT-LIABILITIES> 12,854 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 24 <OTHER-SE> 88,521 <TOTAL-LIABILITY-AND-EQUITY> 101,922 <SALES> 24,072 <TOTAL-REVENUES> 24,072 <CGS> 7,509 <TOTAL-COSTS> 7,509 <OTHER-EXPENSES> 11,443 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 26 <INCOME-PRETAX> 5,549 <INCOME-TAX> 1,337 <INCOME-CONTINUING> 4,212 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,212 <EPS-PRIMARY> 0.17 <EPS-DILUTED> 0.17