<ARTICLE> 5
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                           7,394
<SECURITIES>                                    18,773
<RECEIVABLES>                                   13,242
<ALLOWANCES>                                      (741)
<INVENTORY>                                          0
<CURRENT-ASSETS>                                42,021
<PP&E>                                          40,851
<DEPRECIATION>                                 (17,522)
<TOTAL-ASSETS>                                 103,150
<CURRENT-LIABILITIES>                            7,194
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,909
<OTHER-SE>                                      73,639
<TOTAL-LIABILITY-AND-EQUITY>                   103,150
<SALES>                                         52,528
<TOTAL-REVENUES>                                57,209
<CGS>                                           22,956
<TOTAL-COSTS>                                   22,956
<OTHER-EXPENSES>                                27,790
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              (1,322)
<INCOME-PRETAX>                                  7,785
<INCOME-TAX>                                     2,647
<INCOME-CONTINUING>                              5,138
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,138
<EPS-BASIC>                                        .27
<EPS-DILUTED>                                      .26