<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                          72,019
<SECURITIES>                                   131,283
<RECEIVABLES>                                   66,604
<ALLOWANCES>                                     2,722
<INVENTORY>                                     41,753
<CURRENT-ASSETS>                               326,270
<PP&E>                                          48,139
<DEPRECIATION>                                  25,168
<TOTAL-ASSETS>                                 358,321
<CURRENT-LIABILITIES>                           32,501
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         2,515
<OTHER-SE>                                     323,305
<TOTAL-LIABILITY-AND-EQUITY>                   358,321
<SALES>                                         74,636
<TOTAL-REVENUES>                                74,636
<CGS>                                                0
<TOTAL-COSTS>                                   32,737
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 15,216
<INCOME-TAX>                                     5,283
<INCOME-CONTINUING>                              9,933
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     9,933
<EPS-PRIMARY>                                     0.45<F1>
<EPS-DILUTED>                                     0.44
<FN>
<F1>The amount is reported as EPS BASIC, NOT PRIMARY.
</FN>