WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000742286
<NAME> International Series, Inc.
<SERIES>
<NUMBER> 022
<NAME> Federated International Income Fund - Class B
<S> <C>
<PERIOD-TYPE> 6-mos
<FISCAL-YEAR-END> Nov-30-2000
<PERIOD-END> May-31-2000
<INVESTMENTS-AT-COST> 102,564,097
<INVESTMENTS-AT-VALUE> 82,127,757
<RECEIVABLES> 10,071,674
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 92,199,431
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 112,422
<TOTAL-LIABILITIES> 112,422
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 135,201,070
<SHARES-COMMON-STOCK> 968,932
<SHARES-COMMON-PRIOR> 1,107,654
<ACCUMULATED-NII-CURRENT> 1,006,332
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (23,468,620)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (20,651,773)
<NET-ASSETS> 8,654,407
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4,021,251
<OTHER-INCOME> 0
<EXPENSES-NET> (959,860)
<NET-INVESTMENT-INCOME> 3,061,391
<REALIZED-GAINS-CURRENT> (14,202,199)
<APPREC-INCREASE-CURRENT> 3,761,967
<NET-CHANGE-FROM-OPS> (7,378,841)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (154,561)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 134,420
<NUMBER-OF-SHARES-REDEEMED> (284,248)
<SHARES-REINVESTED> 11,106
<NET-CHANGE-IN-ASSETS> (38,051,247)
<ACCUMULATED-NII-PRIOR> 258,376
<ACCUMULATED-GAINS-PRIOR> (9,266,421)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 445,457
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,075,720
<AVERAGE-NET-ASSETS> 9,624,886
<PER-SHARE-NAV-BEGIN> 9.660
<PER-SHARE-NII> 0.190
<PER-SHARE-GAIN-APPREC> (0.780)
<PER-SHARE-DIVIDEND> (0.140)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 8.930
<EXPENSE-RATIO> 2.25
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>