<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996<F1>
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<EXCHANGE-RATE>                                      1
<CASH>                                          25,840
<SECURITIES>                                    55,676
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                57,716
<PP&E>                                          18,910
<DEPRECIATION>                                   8,490
<TOTAL-ASSETS>                                  93,277
<CURRENT-LIABILITIES>                            8,056
<BONDS>                                              0
<COMMON>                                           202
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                      84,594
<TOTAL-LIABILITY-AND-EQUITY>                    93,277
<SALES>                                              0
<TOTAL-REVENUES>                                   625
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                 7,575
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                (5,679)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (5,679)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (5,679)
<EPS-PRIMARY>                                   (0.28)
<EPS-DILUTED>                                   (0.28)
<FN>
<F1>Marketable securities includes $25,091 of long-term investments.
</FN>