<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE FINANCIAL STATEMENTS INCLUDED IN THIS REPORT AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUN-30-1998 <EXCHANGE-RATE> 1 <CASH> 38,596 <SECURITIES> 10,564 <RECEIVABLES> 5,861 <ALLOWANCES> 1,250 <INVENTORY> 0 <CURRENT-ASSETS> 58,857 <PP&E> 18,312 <DEPRECIATION> 12,059 <TOTAL-ASSETS> 82,951 <CURRENT-LIABILITIES> 17,031 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 340 <OTHER-SE> 65,580 <TOTAL-LIABILITY-AND-EQUITY> 82,951 <SALES> 13,133 <TOTAL-REVENUES> 19,256 <CGS> 2,344 <TOTAL-COSTS> 5,161 <OTHER-EXPENSES> 25,659 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (9,486) <INCOME-TAX> 150 <INCOME-CONTINUING> (9,636) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (9,636) <EPS-PRIMARY> (0.28) <EPS-DILUTED> (0.28)