<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1 <CASH> 18,423 <SECURITIES> 28,587 <RECEIVABLES> 11,523 <ALLOWANCES> 1,300 <INVENTORY> 623 <CURRENT-ASSETS> 68,124 <PP&E> 38,608 <DEPRECIATION> 19,693 <TOTAL-ASSETS> 131,668 <CURRENT-LIABILITIES> 25,316 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 339 <OTHER-SE> 106,013 <TOTAL-LIABILITY-AND-EQUITY> 131,668 <SALES> 29,899 <TOTAL-REVENUES> 39,101 <CGS> 6,953 <TOTAL-COSTS> 12,771 <OTHER-EXPENSES> 52,573 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (24,458) <INCOME-TAX> 992 <INCOME-CONTINUING> (25,450) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (25,450) <EPS-PRIMARY> (.75) <EPS-DILUTED> (.75)