<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF INCOME INCLUDED IN THE
COMPANY'S FORM 10-Q FOR THE PERIOD ENDING JUNE 30, 1998 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> USD
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<EXCHANGE-RATE>                                      1
<CASH>                                          55,575
<SECURITIES>                                    27,366
<RECEIVABLES>                                  110,160
<ALLOWANCES>                                     3,570
<INVENTORY>                                     12,283
<CURRENT-ASSETS>                               216,529
<PP&E>                                         144,158
<DEPRECIATION>                                  76,560
<TOTAL-ASSETS>                                 349,936
<CURRENT-LIABILITIES>                           99,175
<BONDS>                                          5,782
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       163,497
<OTHER-SE>                                      81,482
<TOTAL-LIABILITY-AND-EQUITY>                   349,936
<SALES>                                        163,986
<TOTAL-REVENUES>                               239,548
<CGS>                                           52,316
<TOTAL-COSTS>                                  104,865
<OTHER-EXPENSES>                               162,393
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 210
<INCOME-PRETAX>                               (25,206)
<INCOME-TAX>                                    16,328
<INCOME-CONTINUING>                           (41,534)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (41,534)
<EPS-PRIMARY>                                   (0.83)
<EPS-DILUTED>                                   (0.83)