<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-END>                               SEP-30-1995
<CASH>                                         154,419
<SECURITIES>                                    31,425
<RECEIVABLES>                                   76,755
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               278,624
<PP&E>                                         217,509
<DEPRECIATION>                                 123,069
<TOTAL-ASSETS>                                 432,502
<CURRENT-LIABILITIES>                           96,635
<BONDS>                                              0
<COMMON>                                       266,525
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                      15,913
<TOTAL-LIABILITY-AND-EQUITY>                   432,502
<SALES>                                        274,821
<TOTAL-REVENUES>                               274,821
<CGS>                                           82,642
<TOTAL-COSTS>                                  159,946
<OTHER-EXPENSES>                               (3,862)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,820
<INCOME-PRETAX>                                 36,095  
<INCOME-TAX>                                     4,790
<INCOME-CONTINUING>                             31,305
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    31,305
<EPS-PRIMARY>                                      .57
<EPS-DILUTED>                                      .57