<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          69,253
<SECURITIES>                                   148,351
<RECEIVABLES>                                   42,914
<ALLOWANCES>                                     2,740
<INVENTORY>                                     48,951
<CURRENT-ASSETS>                               318,757
<PP&E>                                          52,096
<DEPRECIATION>                                  25,162
<TOTAL-ASSETS>                                 354,716
<CURRENT-LIABILITIES>                           28,645
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         2,518
<OTHER-SE>                                     323,553
<TOTAL-LIABILITY-AND-EQUITY>                   354,716
<SALES>                                        125,585
<TOTAL-REVENUES>                               125,585
<CGS>                                                0
<TOTAL-COSTS>                                   54,999
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 21,349
<INCOME-TAX>                                     7,296
<INCOME-CONTINUING>                             14,053
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,053
<EPS-PRIMARY>                                     0.63<F1>
<EPS-DILUTED>                                     0.63
<FN>
<F1>The amount is reported as EPS BASIC, NOT PRIMARY.
</FN>