<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONDENSED
CONSOLIDATED BALANCE SHEET AT MARCH 31, 1998 AND CONDENSED CONSOLIDATED
STATEMENTS OF INCOME FOR THE QUARTER ENDED MARCH 31, 1998 (UNAUDITED) AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                          30,607
<SECURITIES>                                    29,169
<RECEIVABLES>                                  291,136
<ALLOWANCES>                                         0
<INVENTORY>                                    141,533
<CURRENT-ASSETS>                               560,717
<PP&E>                                         269,317
<DEPRECIATION>                                 118,597
<TOTAL-ASSETS>                               1,019,925
<CURRENT-LIABILITIES>                          267,717
<BONDS>                                         20,800
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        86,711
<OTHER-SE>                                     599,347
<TOTAL-LIABILITY-AND-EQUITY>                 1,019,925
<SALES>                                        193,130
<TOTAL-REVENUES>                               295,739
<CGS>                                          118,063
<TOTAL-COSTS>                                  193,604
<OTHER-EXPENSES>                                64,676
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 40,993
<INCOME-TAX>                                    14,143
<INCOME-CONTINUING>                             26,850
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    26,850
<EPS-PRIMARY>                                     0.39
<EPS-DILUTED>                                     0.39