<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          52,634
<SECURITIES>                                   154,944
<RECEIVABLES>                                   75,963
<ALLOWANCES>                                     2,920
<INVENTORY>                                     45,956
<CURRENT-ASSETS>                               333,966
<PP&E>                                          57,294
<DEPRECIATION>                                  25,562
<TOTAL-ASSETS>                                 374,633
<CURRENT-LIABILITIES>                           36,793
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         2,519
<OTHER-SE>                                     335,321
<TOTAL-LIABILITY-AND-EQUITY>                   374,633
<SALES>                                        208,554
<TOTAL-REVENUES>                               208,554
<CGS>                                                0
<TOTAL-COSTS>                                   88,646
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 46,013
<INCOME-TAX>                                    15,733
<INCOME-CONTINUING>                             30,280
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    30,280
<EPS-PRIMARY>                                     1.36<F1>
<EPS-DILUTED>                                     1.35
<FN>
<F1> The amount is reported as EPS BASIC, NOT PRIMARY.
</FN>