<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FINANCIAL
STATEMENTS FILED IN Q2 1998 QUARTERLY REPORT ON FORM 10Q CONDENSED CONSOLIDATED
BALANCE SHEET, STATEMENT OF OPERATIONS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FORM 10Q JUNE 30, 1998.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               JUN-30-1998
<EXCHANGE-RATE>                                      1
<CASH>                                         $14,633
<SECURITIES>                                    34,341<F1>
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                26,906
<PP&E>                                          19,899
<DEPRECIATION>                                  14,190
<TOTAL-ASSETS>                                  55,333
<CURRENT-LIABILITIES>                            2,897
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           204
<OTHER-SE>                                      51,957
<TOTAL-LIABILITY-AND-EQUITY>                    52,161
<SALES>                                              0
<TOTAL-REVENUES>                                   432
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                 1,834
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  (772)
<INCOME-TAX>                                     (772)
<INCOME-CONTINUING>                              (772)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (772)
<EPS-PRIMARY>                                   (0.04)
<EPS-DILUTED>                                   (0.04)
<FN>
<F1>MARKETABLE SECURITIES INCLUDE $22,669 IN LONG-TERM INVESTMENTS.
</FN>