<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>
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<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>                                 415,854 
<CURRENT-LIABILITIES>                           99,175
<BONDS>                                          5,782 
<PREFERRED-MANDATORY>                                0 
<PREFERRED>                                          0 
<COMMON>                                       163,497 
<OTHER-SE>                                     138,602 
<TOTAL-LIABILITY-AND-EQUITY>                   415,854 
<SALES>                                        163,986 
<TOTAL-REVENUES>                               239,548 
<CGS>                                           52,316 
<TOTAL-COSTS>                                  104,865 
<OTHER-EXPENSES>                               105,555 
<LOSS-PROVISION>                                     0 
<INTEREST-EXPENSE>                                 210 
<INCOME-PRETAX>                                 31,632 
<INCOME-TAX>                                    16,046 
<INCOME-CONTINUING>                             15,586 
<DISCONTINUED>                                       0 
<EXTRAORDINARY>                                      0 
<CHANGES>                                            0 
<NET-INCOME>                                    15,586
<EPS-PRIMARY>                                    (0.49)  
<EPS-DILUTED>                                    (0.46)