<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 19,189 <SECURITIES> 24,163<F1> <RECEIVABLES> 3,855 <ALLOWANCES> 1,014 <INVENTORY> 2,535 <CURRENT-ASSETS> 48,769 <PP&E> 20,531 <DEPRECIATION> 14,829 <TOTAL-ASSETS> 58,172 <CURRENT-LIABILITIES> 14,879 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 118,598 <OTHER-SE> (86,741) <TOTAL-LIABILITY-AND-EQUITY> 58,172 <SALES> 1,700 <TOTAL-REVENUES> 17,533 <CGS> 918 <TOTAL-COSTS> 4,009 <OTHER-EXPENSES> 14,834 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 580 <INCOME-PRETAX> (563) <INCOME-TAX> 110 <INCOME-CONTINUING> (673) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (673) <EPS-PRIMARY> (.04) <EPS-DILUTED> (.04) <FN> <F1>THIS AMOUNT REPRESENTS SHORT-TERM INVESTMENTS HELD BY THE COMPANY AT 6-30-97. </FN>