<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> SEP-30-1996 <CASH> 163,499 <SECURITIES> 34,456 <RECEIVABLES> 98,677 <ALLOWANCES> 0 <INVENTORY> 5,201 <CURRENT-ASSETS> 322,211 <PP&E> 236,332 <DEPRECIATION> (135,504) <TOTAL-ASSETS> 498,962 <CURRENT-LIABILITIES> 112,199 <BONDS> 0 <COMMON> 296,206 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 37,145 <TOTAL-LIABILITY-AND-EQUITY> 498,962 <SALES> 327,125 <TOTAL-REVENUES> 327,125 <CGS> 98,809 <TOTAL-COSTS> 221,512 <OTHER-EXPENSES> (4,317) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,740 <INCOME-PRETAX> 9,381 <INCOME-TAX> 3,010 <INCOME-CONTINUING> 6,371 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 6,371 <EPS-PRIMARY> .10 <EPS-DILUTED> .10