<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
FOR THE PERIOD ENDED JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<EXCHANGE-RATE>                                      1
<CASH>                                          23,925
<SECURITIES>                                    36,766
<RECEIVABLES>                                  291,760
<ALLOWANCES>                                         0
<INVENTORY>                                    123,262
<CURRENT-ASSETS>                               528,946
<PP&E>                                         239,176
<DEPRECIATION>                                 111,551
<TOTAL-ASSETS>                                 946,995
<CURRENT-LIABILITIES>                          249,328
<BONDS>                                         20,800
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        86,516
<OTHER-SE>                                     527,378
<TOTAL-LIABILITY-AND-EQUITY>                   946,995
<SALES>                                        375,481
<TOTAL-REVENUES>                               567,810
<CGS>                                          228,928
<TOTAL-COSTS>                                  369,248
<OTHER-EXPENSES>                               116,374
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 82,489
<INCOME-TAX>                                    28,066
<INCOME-CONTINUING>                             54,423
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    54,423
<EPS-PRIMARY>                                      .79
<EPS-DILUTED>                                      .78