<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                          22,296
<SECURITIES>                                    27,960<F1>
<RECEIVABLES>                                    3,362
<ALLOWANCES>                                     1,014
<INVENTORY>                                      2,028
<CURRENT-ASSETS>                                55,892
<PP&E>                                          19,228
<DEPRECIATION>                                  14,208
<TOTAL-ASSETS>                                  64,371
<CURRENT-LIABILITIES>                           19,631
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       118,483
<OTHER-SE>                                    (86,470)
<TOTAL-LIABILITY-AND-EQUITY>                    64,371
<SALES>                                          1,700
<TOTAL-REVENUES>                                 9,292
<CGS>                                              835
<TOTAL-COSTS>                                    2,422
<OTHER-EXPENSES>                                 7,523
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 282
<INCOME-PRETAX>                                  (316)
<INCOME-TAX>                                        47
<INCOME-CONTINUING>                              (363)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (363)
<EPS-PRIMARY>                                    (.02)
<EPS-DILUTED>                                    (.02)
<FN>
<F1>THIS AMOUNT REPRESENTS SHORT-TERM INVESTMENTS HELD BY THE COMPANY AT 3/31/97
</FN>