<ARTICLE>                     5
<LEGEND>
     THIS SCHEDULE  CONTAINS  SUMMARY  INFORMATION  EXTRACTED FROM THE CONDENSED
CONSOLIDATED BALANCE SHEETS ON THE FORM 10-Q FOR THE PERIOD ENDED MARCH 31, 1999
AND THE CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS AS FILED ON FORM 10-Q FOR
THE PERIOD ENDED MARCH 31, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>                     
<MULTIPLIER>                                   1,000               
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   MAR-31-1999
<CASH>                                           53,720
<SECURITIES>                                     47,794
<RECEIVABLES>                                    75,905
<ALLOWANCES>                                      6,923
<INVENTORY>                                      11,828
<CURRENT-ASSETS>                                212,543
<PP&E>                                          116,637
<DEPRECIATION>                                   81,173
<TOTAL-ASSETS>                                  439,613
<CURRENT-LIABILITIES>                            93,677
<BONDS>                                               0
<PREFERRED-MANDATORY>                                 0
<PREFERRED>                                           0
<COMMON>                                            265
<OTHER-SE>                                      296,329
<TOTAL-LIABILITY-AND-EQUITY>                    439,613
<SALES>                                         111,283
<TOTAL-REVENUES>                                111,283
<CGS>                                            44,420
<TOTAL-COSTS>                                    44,420 
<OTHER-EXPENSES>                                 84,063
<LOSS-PROVISION>                                      0
<INTEREST-EXPENSE>                                    0
<INCOME-PRETAX>                                 (16,600)
<INCOME-TAX>                                     (5,146)
<INCOME-CONTINUING>                             (11,454)     
<DISCONTINUED>                                        0
<EXTRAORDINARY>                                       0
<CHANGES>                                             0
<NET-INCOME>                                    (11,454)
<EPS-PRIMARY>                                     (0.47)
<EPS-DILUTED>                                     (0.47)