<ARTICLE>                                       5
       
                                                                                                  
<PERIOD-TYPE>                                                                                       YEAR
<FISCAL-YEAR-END>                                                                           Dec-31-1997
<PERIOD-END>                                                                                Dec-31-1997
<CASH>                                                                                            37,225
<SECURITIES>                                                                                      17,921
<RECEIVABLES>                                                                                          0
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<PP&E>                                                                                            30,478
<DEPRECIATION>                                                                                    25,914
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<CURRENT-LIABILITIES>                                                                              8,763
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<PREFERRED>                                                                                            0
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<TOTAL-COSTS>                                                                                          0
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<LOSS-PROVISION>                                                                                       0
<INTEREST-EXPENSE>                                                                                1,101
<INCOME-PRETAX>                                                                                  (15,765)
<INCOME-TAX>                                                                                           0
<INCOME-CONTINUING>                                                                              (15,765)
<DISCONTINUED>                                                                                         0
<EXTRAORDINARY>                                                                                        0
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<NET-INCOME>                                                                                     (15,765)
<EPS-PRIMARY>                                                                                      (0.44)
<EPS-DILUTED>                                                                                      (0.44)