<ARTICLE>                     5
<LEGEND>   
            This schedule contains summary financial  information extracted from
            the condensed balance sheet,  condensed  statement of operations and
            condensed  statement of cash flows  included in the  Company's  Form
            10-Q  for the  three  month  period  ended  March  31,  1997  and is
            qualified in its entirety by reference to such financial  statements
            and the notes thereto.
</LEGEND>
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997
<PERIOD-END>                                   MAR-31-1997
<CASH>                                          93,806
<SECURITIES>                                   142,115
<RECEIVABLES>                                   49,765
<ALLOWANCES>                                     1,828
<INVENTORY>                                     12,955
<CURRENT-ASSETS>                               329,385
<PP&E>                                          27,353
<DEPRECIATION>                                  16,610
<TOTAL-ASSETS>                                 341,485
<CURRENT-LIABILITIES>                           69,981
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           518
<OTHER-SE>                                     270,986
<TOTAL-LIABILITY-AND-EQUITY>                   341,485
<SALES>                                         91,006
<TOTAL-REVENUES>                                91,006
<CGS>                                           41,093
<TOTAL-COSTS>                                   41,093
<OTHER-EXPENSES>                                20,557
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 31,919
<INCOME-TAX>                                    11,491
<INCOME-CONTINUING>                             31,919
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    31,919
<EPS-PRIMARY>                                     0.40
<EPS-DILUTED>                                     0.37