<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JUL-01-1998 <PERIOD-END> SEP-30-1998 <CASH> 2,261,000 <SECURITIES> 0 <RECEIVABLES> 15,484,000 <ALLOWANCES> (613,000) <INVENTORY> 558,000 <CURRENT-ASSETS> 18,548,000 <PP&E> 32,662,000 <DEPRECIATION> (18,451,000) <TOTAL-ASSETS> 51,578,000 <CURRENT-LIABILITIES> 23,757,000 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 20,608,000 <OTHER-SE> 0 <TOTAL-LIABILITY-AND-EQUITY> 51,578,000 <SALES> 42,312,000 <TOTAL-REVENUES> 42,312,000 <CGS> 25,578,000 <TOTAL-COSTS> 25,578,000 <OTHER-EXPENSES> 8,953,000 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 583,000 <INCOME-PRETAX> 7,217,000 <INCOME-TAX> 2,959,000 <INCOME-CONTINUING> 4,258,000 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,258,000 <EPS-PRIMARY> 0.44 <EPS-DILUTED> 0.43