<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the December
31, 1997 financial statements and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                           6,227
<SECURITIES>                                    27,554
<RECEIVABLES>                                   16,165
<ALLOWANCES>                                     (242)
<INVENTORY>                                          0
<CURRENT-ASSETS>                                51,531
<PP&E>                                          30,545
<DEPRECIATION>                                (14,944)
<TOTAL-ASSETS>                                  68,651
<CURRENT-LIABILITIES>                           13,422
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            77
<OTHER-SE>                                      49,795
<TOTAL-LIABILITY-AND-EQUITY>                    68,651
<SALES>                                         47,888
<TOTAL-REVENUES>                                47,888
<CGS>                                           29,452
<TOTAL-COSTS>                                   40,938
<OTHER-EXPENSES>                                   784
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 717
<INCOME-PRETAX>                                  7,017
<INCOME-TAX>                                     2,951
<INCOME-CONTINUING>                              4,066
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     4,066
<EPS-PRIMARY>                                     1.18<F1>
<EPS-DILUTED>                                     0.60
<FN>
<F1>
Represents basic EPS calculated in accordance with Statement of Financial
Accounting Standards No. 128, "Earnings per Share."
</FN>