<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ONESOURCE
INFORMATION SERVICES, INC.'S CONSOLIDATED BALANCE SHEET FOR JUNE 30, 2000 AND
CONSOLIDATED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2000 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                          16,231
<SECURITIES>                                         0
<RECEIVABLES>                                   11,023
<ALLOWANCES>                                       362
<INVENTORY>                                         39
<CURRENT-ASSETS>                                33,166
<PP&E>                                           8,074
<DEPRECIATION>                                   3,247
<TOTAL-ASSETS>                                  47,869
<CURRENT-LIABILITIES>                           34,626
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           115
<OTHER-SE>                                      13,128
<TOTAL-LIABILITY-AND-EQUITY>                    47,869
<SALES>                                         24,129
<TOTAL-REVENUES>                                24,129
<CGS>                                            8,754
<TOTAL-COSTS>                                    8,754
<OTHER-EXPENSES>                                17,650
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                (30)
<INCOME-PRETAX>                                  (870)
<INCOME-TAX>                                        60
<INCOME-CONTINUING>                              (930)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     (930)
<EPS-BASIC>                                     (0.08)
<EPS-DILUTED>                                   (0.08)