<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          63,877
<SECURITIES>                                   379,879
<RECEIVABLES>                                   60,791
<ALLOWANCES>                                     4,550
<INVENTORY>                                     77,236
<CURRENT-ASSETS>                               673,417
<PP&E>                                         152,588
<DEPRECIATION>                                  64,511
<TOTAL-ASSETS>                                 991,884
<CURRENT-LIABILITIES>                          197,270
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            97
<OTHER-SE>                                     794,517
<TOTAL-LIABILITY-AND-EQUITY>                   991,884
<SALES>                                        317,692
<TOTAL-REVENUES>                               317,692
<CGS>                                          121,781
<TOTAL-COSTS>                                  121,781
<OTHER-EXPENSES>                                85,350
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,832
<INCOME-PRETAX>                                112,378
<INCOME-TAX>                                    36,520
<INCOME-CONTINUING>                             75,658
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    71,751
<EPS-PRIMARY>                                     0.80<F1>
<EPS-DILUTED>                                     0.74
<FN>
<F1>FOR PURPOSES OF THIS EXHIBIT, PRIMARY MEANS BASIC.
</FN>