<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM CONDENSED
CONSOLIDATED BALANCE SHEET AT MARCH 31, 1997 AND CONDENSED CONSOLIDATED
STATEMENTS OF INCOME FOR THE QUARTER ENDED MARCH 31, 1997 (UNAUDITED) AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLAR
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAR-31-1997
<EXCHANGE-RATE>                                      1
<CASH>                                          33,607
<SECURITIES>                                    41,748
<RECEIVABLES>                                  279,907
<ALLOWANCES>                                         0
<INVENTORY>                                    119,812
<CURRENT-ASSETS>                               529,345
<PP&E>                                         221,263
<DEPRECIATION>                                 109,863
<TOTAL-ASSETS>                                 921,171
<CURRENT-LIABILITIES>                          265,394
<BONDS>                                          5,800
<COMMON>                                        86,440
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     504,222
<TOTAL-LIABILITY-AND-EQUITY>                   921,171
<SALES>                                        171,760
<TOTAL-REVENUES>                               264,608
<CGS>                                          102,746
<TOTAL-COSTS>                                  172,249
<OTHER-EXPENSES>                                56,454
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 35,959
<INCOME-TAX>                                    12,226
<INCOME-CONTINUING>                             23,733
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    23,733
<EPS-PRIMARY>                                      .34
<EPS-DILUTED>                                      .34