<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> JUN-30-1996 <CASH> 170,004 <SECURITIES> 22,309 <RECEIVABLES> 118,187 <ALLOWANCES> 0 <INVENTORY> 2,862 <CURRENT-ASSETS> 330,754 <PP&E> 234,832 <DEPRECIATION> (134,330) <TOTAL-ASSETS> 504,985 <CURRENT-LIABILITIES> 120,853 <BONDS> 0 <COMMON> 285,646 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 44,362 <TOTAL-LIABILITY-AND-EQUITY> 504,985 <SALES> 224,740 <TOTAL-REVENUES> 224,740 <CGS> 65,435 <TOTAL-COSTS> 150,477 <OTHER-EXPENSES> (2,742) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,109 <INCOME-PRETAX> 10,461 <INCOME-TAX> 2,210 <INCOME-CONTINUING> 8,251 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 8,251 <EPS-PRIMARY> .13 <EPS-DILUTED> .13