<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> MAR-31-1998 <CASH> 3,249,000 <SECURITIES> 0 <RECEIVABLES> 11,261,000 <ALLOWANCES> (552,000) <INVENTORY> 505,000 <CURRENT-ASSETS> 15,449,000 <PP&E> 19,482,000 <DEPRECIATION> (10,963,000) <TOTAL-ASSETS> 34,042,000 <CURRENT-LIABILITIES> 9,546,000 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 20,206,000 <OTHER-SE> 0 <TOTAL-LIABILITY-AND-EQUITY> 34,042,000 <SALES> 11,643,000 <TOTAL-REVENUES> 11,643,000 <CGS> 7,138,000 <TOTAL-COSTS> 7,138,000 <OTHER-EXPENSES> 2,523,000 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 101,000 <INCOME-PRETAX> 1,895,000 <INCOME-TAX> 777,000 <INCOME-CONTINUING> 1,118,000 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,118,000 <EPS-PRIMARY> 0.12 <EPS-DILUTED> 0.11