<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR YEAR YEAR <FISCAL-YEAR-END> MAY-31-1997 MAY-31-1996 MAY-31-1995 <PERIOD-START> JUN-01-1996 JUN-01-1995 JUN-01-1994 <PERIOD-END> MAY-31-1997 MAY-31-1996 MAY-31-1995 <CASH> 17,801 19,600 0 <SECURITIES> 27,860 18,363 0 <RECEIVABLES> 51,099 40,725 0 <ALLOWANCES> 230 314 0 <INVENTORY> 32,851 31,073 0 <CURRENT-ASSETS> 132,327 113,013 0 <PP&E> 40,963 39,086 0 <DEPRECIATION> 24,559 22,265 0 <TOTAL-ASSETS> 154,813 135,458 0 <CURRENT-LIABILITIES> 15,699 18,613 0 <BONDS> 0 0 0 <PREFERRED-MANDATORY> 0 0 0 <PREFERRED> 0 0 0 <COMMON> 57,736 55,940 0 <OTHER-SE> 81,378 60,905 0 <TOTAL-LIABILITY-AND-EQUITY> 154,813 135,458 0 <SALES> 160,149 166,310 112,900 <TOTAL-REVENUES> 160,149 166,310 112,900 <CGS> 73,097 75,167 53,238 <TOTAL-COSTS> 73,097 75,167 53,238 <OTHER-EXPENSES> 56,012 64,307 42,577 <LOSS-PROVISION> 0 0 0 <INTEREST-EXPENSE> 0 0 0 <INCOME-PRETAX> 32,488 27,327 17,483 <INCOME-TAX> 11,238 10,028 5,266 <INCOME-CONTINUING> 0 0 0 <DISCONTINUED> 0 0 0 <EXTRAORDINARY> 0 0 0 <CHANGES> 0 0 0 <NET-INCOME> 21,250 17,299 12,217 <EPS-PRIMARY> 2.27 1.86 1.49 <EPS-DILUTED> 2.27 1.86 1.49