<ARTICLE>                     5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
CONDENSED CONSOLIDATED BALANCE SHEET AND THE CONDENSED CONSOLIDATED STATEMENT OF
INCOME AS FILED ON FORM 10-Q FOR THE PERIOD ENDED JUNE 30, 1997  (UNAUDITED) AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                      1000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997
<PERIOD-END>                                   JUN-30-1997
<CASH>                                          89,606
<SECURITIES>                                    57,801
<RECEIVABLES>                                   88,561
<ALLOWANCES>                                     6,777
<INVENTORY>                                     23,271
<CURRENT-ASSETS>                               277,809
<PP&E>                                          95,821
<DEPRECIATION>                                  52,951
<TOTAL-ASSETS>                                 348,965
<CURRENT-LIABILITIES>                          107,808
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           237
<OTHER-SE>                                     240,140
<TOTAL-LIABILITY-AND-EQUITY>                   348,965
<SALES>                                        231,093
<TOTAL-REVENUES>                               231,093
<CGS>                                          115,886
<TOTAL-COSTS>                                  115,886
<OTHER-EXPENSES>                               105,792
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 12,700
<INCOME-TAX>                                     4,445
<INCOME-CONTINUING>                              8,255
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,255
<EPS-PRIMARY>                                      .36
<EPS-DILUTED>                                      .35