<ARTICLE> 5
<RESTATED> 
       
                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          MAY-31-1999             MAY-31-1998
<PERIOD-END>                               NOV-30-1998             NOV-30-1997
<CASH>                                       114989000                94420000
<SECURITIES>                                  46516000                45117000
<RECEIVABLES>                                207977000               180188000
<ALLOWANCES>                                   4671000                 5697000
<INVENTORY>                                  202023000               158941000
<CURRENT-ASSETS>                             607918000               502138000
<PP&E>                                       250304000               176589000
<DEPRECIATION>                                98198000                73241000
<TOTAL-ASSETS>                               922432000               691511000
<CURRENT-LIABILITIES>                        102526000                83993000
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                      76694000                74440000
<OTHER-SE>                                   656454000               529818000
<TOTAL-LIABILITY-AND-EQUITY>                 922432000               691511000
<SALES>                                      360004000               306111000
<TOTAL-REVENUES>                             360004000               306111000
<CGS>                                        109102000                95233000
<TOTAL-COSTS>                                250335000               214624000
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                              199000                  135000
<INCOME-PRETAX>                              117088000                95314000
<INCOME-TAX>                                  43214000                35291000
<INCOME-CONTINUING>                           69488000                60023000
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                  69488000                60023000
<EPS-PRIMARY>                                      .62                     .54
<EPS-DILUTED>                                      .61                     .53