<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SUCH 10-Q
DATED SEPTEMBER 30, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
10-Q.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               SEP-30-1996
<EXCHANGE-RATE>                                      1
<CASH>                                          39,124
<SECURITIES>                                    92,309
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               132,374
<PP&E>                                          26,426
<DEPRECIATION>                                  19,412
<TOTAL-ASSETS>                                 143,460
<CURRENT-LIABILITIES>                            5,375
<BONDS>                                              0
<COMMON>                                           210
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     133,456
<TOTAL-LIABILITY-AND-EQUITY>                   143,460
<SALES>                                              0
<TOTAL-REVENUES>                                 4,120
<CGS>                                                0
<TOTAL-COSTS>                                   10,357
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 109
<INCOME-PRETAX>                                (6,346)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (6,346)
<EPS-PRIMARY>                                   (0.33)
<EPS-DILUTED>                                        0