<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                         148,302
<SECURITIES>                                    98,079
<RECEIVABLES>                                   51,413
<ALLOWANCES>                                     3,117
<INVENTORY>                                     32,652
<CURRENT-ASSETS>                               344,268
<PP&E>                                         116,739
<DEPRECIATION>                                  41,504
<TOTAL-ASSETS>                                 505,645
<CURRENT-LIABILITIES>                           36,281
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           134
<OTHER-SE>                                     444,490
<TOTAL-LIABILITY-AND-EQUITY>                   505,645
<SALES>                                         54,064
<TOTAL-REVENUES>                                61,105
<CGS>                                           21,870
<TOTAL-COSTS>                                   44,469
<OTHER-EXPENSES>                               (7,621)
<LOSS-PROVISION>                                   226
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 24,257
<INCOME-TAX>                                     9,711
<INCOME-CONTINUING>                             14,546
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    14,546
<EPS-PRIMARY>                                     0.35
<EPS-DILUTED>                                     0.35