<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1996 <PERIOD-END> SEP-30-1996 <CASH> 31,792 <SECURITIES> 83,030 <RECEIVABLES> 90,309 <ALLOWANCES> 5,886 <INVENTORY> 16,083 <CURRENT-ASSETS> 228,436 <PP&E> 94,467 <DEPRECIATION> 54,114 <TOTAL-ASSETS> 327,183 <CURRENT-LIABILITIES> 78,876 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 35,476 <OTHER-SE> 176,899 <TOTAL-LIABILITY-AND-EQUITY> 327,183 <SALES> 0 <TOTAL-REVENUES> 482,863 <CGS> 0 <TOTAL-COSTS> 268,345 <OTHER-EXPENSES> 178,172 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 36,346 <INCOME-TAX> 13,812 <INCOME-CONTINUING> 22,534 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 22,534 <EPS-PRIMARY> 0.63 <EPS-DILUTED> 0.63