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<PAGE> PAGE 12
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
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<PAGE> PAGE 22
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<PAGE> PAGE 23
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<PAGE> PAGE 24
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SIGNATURE MARYANNE ROEPKE
TITLE TREASURER
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THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
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</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
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<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
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</LEGEND>
<CIK> 0000757928
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<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
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MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
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</LEGEND>
<CIK> 0000757928
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<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
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<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
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<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
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<PER-SHARE-GAIN-APPREC> (7.97)
<PER-SHARE-DIVIDEND> 2.76
<PER-SHARE-DISTRIBUTIONS> 1.33
<RETURNS-OF-CAPITAL> 0.16
<PER-SHARE-NAV-END> 54.96
<EXPENSE-RATIO> 0.84
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 51
<NAME> TARGET 2015 FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 201,397,195
<INVESTMENTS-AT-VALUE> 218,337,401
<RECEIVABLES> 0
<ASSETS-OTHER> 295,984
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 218,633,385
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 432,875
<TOTAL-LIABILITIES> 432,875
<SENIOR-EQUITY> 50,693
<PAID-IN-CAPITAL-COMMON> 193,429,710
<SHARES-COMMON-STOCK> 5,069,339
<SHARES-COMMON-PRIOR> 5,051,981
<ACCUMULATED-NII-CURRENT> 8,994,220
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,214,319)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 16,940,206
<NET-ASSETS> 218,200,510
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 12,263,365
<OTHER-INCOME> 0
<EXPENSES-NET> 1,233,875
<NET-INVESTMENT-INCOME> 11,029,490
<REALIZED-GAINS-CURRENT> (1,189,705)
<APPREC-INCREASE-CURRENT> (42,858,822)
<NET-CHANGE-FROM-OPS> (33,019,037)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 7,536,221
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 295,396
<NUMBER-OF-SHARES-SOLD> 4,900,767
<NUMBER-OF-SHARES-REDEEMED> 3,390,581
<SHARES-REINVESTED> 148,946
<NET-CHANGE-IN-ASSETS> 48,119,263
<ACCUMULATED-NII-PRIOR> 5,500,951
<ACCUMULATED-GAINS-PRIOR> 1,035,560
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,225,471
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,233,875
<AVERAGE-NET-ASSETS> 210,141,673
<PER-SHARE-NAV-BEGIN> 49.87
<PER-SHARE-NII> 2.39
<PER-SHARE-GAIN-APPREC> (9.22)
<PER-SHARE-DIVIDEND> 2.10
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.08
<PER-SHARE-NAV-END> 43.04
<EXPENSE-RATIO> 0.59
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 53
<NAME> TARGET 2015 FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 201,397,195
<INVESTMENTS-AT-VALUE> 218,337,401
<RECEIVABLES> 0
<ASSETS-OTHER> 295,984
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 218,633,385
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 432,875
<TOTAL-LIABILITIES> 432,875
<SENIOR-EQUITY> 2
<PAID-IN-CAPITAL-COMMON> 193,480,401
<SHARES-COMMON-STOCK> 172
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 8,994,220
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,214,319)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 16,940,206
<NET-ASSETS> 218,200,510
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 12,263,365
<OTHER-INCOME> 0
<EXPENSES-NET> 1,233,875
<NET-INVESTMENT-INCOME> 11,029,490
<REALIZED-GAINS-CURRENT> (1,189,705)
<APPREC-INCREASE-CURRENT> (42,858,822)
<NET-CHANGE-FROM-OPS> (33,019,037)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 172
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 48,119,263
<ACCUMULATED-NII-PRIOR> 5,500,951
<ACCUMULATED-GAINS-PRIOR> 1,035,560
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,225,471
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,233,875
<AVERAGE-NET-ASSETS> 7,304
<PER-SHARE-NAV-BEGIN> 43.65
<PER-SHARE-NII> 0.46
<PER-SHARE-GAIN-APPREC> (1.09)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 43.02
<EXPENSE-RATIO> 0.83
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 61
<NAME> TARGET 2020 FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 262,830,762
<INVESTMENTS-AT-VALUE> 316,493,813
<RECEIVABLES> 8,517
<ASSETS-OTHER> 3,205,592
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 319,707,922
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,427,103
<TOTAL-LIABILITIES> 2,427,103
<SENIOR-EQUITY> 103,475
<PAID-IN-CAPITAL-COMMON> 218,970,683
<SHARES-COMMON-STOCK> 10,347,549
<SHARES-COMMON-PRIOR> 10,984,477
<ACCUMULATED-NII-CURRENT> 13,317,766
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 31,225,844
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 53,663,051
<NET-ASSETS> 317,280,819
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 20,298,253
<OTHER-INCOME> 65,684
<EXPENSES-NET> 2,211,622
<NET-INVESTMENT-INCOME> 18,152,315
<REALIZED-GAINS-CURRENT> 40,557,105
<APPREC-INCREASE-CURRENT> (132,226,209)
<NET-CHANGE-FROM-OPS> (73,516,789)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 24,377,620
<DISTRIBUTIONS-OF-GAINS> 61,543,905
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,471,007
<NUMBER-OF-SHARES-REDEEMED> 15,052,853
<SHARES-REINVESTED> 2,776,706
<NET-CHANGE-IN-ASSETS> (168,770,952)
<ACCUMULATED-NII-PRIOR> 19,544,059
<ACCUMULATED-GAINS-PRIOR> 23,452,379
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,196,094
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,211,622
<AVERAGE-NET-ASSETS> 376,302,451
<PER-SHARE-NAV-BEGIN> 36.95
<PER-SHARE-NII> 1.62
<PER-SHARE-GAIN-APPREC> (7.96)
<PER-SHARE-DIVIDEND> 2.06
<PER-SHARE-DISTRIBUTIONS> 5.20
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 30.61
<EXPENSE-RATIO> 0.59
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 63
<NAME> TARGET 2020 FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 262,830,762
<INVESTMENTS-AT-VALUE> 316,493,813
<RECEIVABLES> 8,517
<ASSETS-OTHER> 3,205,592
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 319,707,922
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,427,103
<TOTAL-LIABILITIES> 2,427,103
<SENIOR-EQUITY> 188
<PAID-IN-CAPITAL-COMMON> 219,073,970
<SHARES-COMMON-STOCK> 18,770
<SHARES-COMMON-PRIOR> 9,023
<ACCUMULATED-NII-CURRENT> 13,317,766
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 31,225,844
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 53,663,051
<NET-ASSETS> 317,280,819
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 20,298,253
<OTHER-INCOME> 65,684
<EXPENSES-NET> 2,211,622
<NET-INVESTMENT-INCOME> 18,152,315
<REALIZED-GAINS-CURRENT> 40,557,105
<APPREC-INCREASE-CURRENT> (132,226,209)
<NET-CHANGE-FROM-OPS> (73,516,789)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 988
<DISTRIBUTIONS-OF-GAINS> 2,511
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13,812,474
<NUMBER-OF-SHARES-REDEEMED> 24,393,036
<SHARES-REINVESTED> 3,356,693
<NET-CHANGE-IN-ASSETS> (168,770,952)
<ACCUMULATED-NII-PRIOR> 19,544,059
<ACCUMULATED-GAINS-PRIOR> 23,452,379
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,196,094
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,211,622
<AVERAGE-NET-ASSETS> 230,377
<PER-SHARE-NAV-BEGIN> 35.50
<PER-SHARE-NII> 1.50
<PER-SHARE-GAIN-APPREC> (6.45)
<PER-SHARE-DIVIDEND> 2.05
<PER-SHARE-DISTRIBUTIONS> 5.20
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 30.55
<EXPENSE-RATIO> 0.84
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 71
<NAME> TARGET 2025 FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 770,643,637
<INVESTMENTS-AT-VALUE> 747,490,796
<RECEIVABLES> 38,018
<ASSETS-OTHER> 8,533,094
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 756,061,908
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 708,536
<TOTAL-LIABILITIES> 708,536
<SENIOR-EQUITY> 287,655
<PAID-IN-CAPITAL-COMMON> 768,414,653
<SHARES-COMMON-STOCK> 28,765,540
<SHARES-COMMON-PRIOR> 15,718,619
<ACCUMULATED-NII-CURRENT> 20,751,314
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (10,947,409)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (23,152,841)
<NET-ASSETS> 755,353,372
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 26,975,612
<OTHER-INCOME> 159,726
<EXPENSES-NET> 2,725,209
<NET-INVESTMENT-INCOME> 24,410,129
<REALIZED-GAINS-CURRENT> (9,083,532)
<APPREC-INCREASE-CURRENT> (93,055,873)
<NET-CHANGE-FROM-OPS> (77,729,276)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 12,412,051
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 3,038,701
<NUMBER-OF-SHARES-SOLD> 36,680,251
<NUMBER-OF-SHARES-REDEEMED> 19,644,098
<SHARES-REINVESTED> 483,568
<NET-CHANGE-IN-ASSETS> 399,141,824
<ACCUMULATED-NII-PRIOR> 8,762,384
<ACCUMULATED-GAINS-PRIOR> 1,156,628
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,705,602
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,725,209
<AVERAGE-NET-ASSETS> 464,548,390
<PER-SHARE-NAV-BEGIN> 31.67
<PER-SHARE-NII> 1.46
<PER-SHARE-GAIN-APPREC> (6.91)
<PER-SHARE-DIVIDEND> 1.28
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.31
<PER-SHARE-NAV-END> 26.22
<EXPENSE-RATIO> 0.59
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 73
<NAME> TARGET 2025 FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 770,643,637
<INVESTMENTS-AT-VALUE> 747,490,796
<RECEIVABLES> 38,018
<ASSETS-OTHER> 8,533,094
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 756,061,908
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 708,536
<TOTAL-LIABILITIES> 708,536
<SENIOR-EQUITY> 382
<PAID-IN-CAPITAL-COMMON> 768,701,926
<SHARES-COMMON-STOCK> 38,170
<SHARES-COMMON-PRIOR> 11,853
<ACCUMULATED-NII-CURRENT> 20,751,314
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (10,947,409)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (23,152,841)
<NET-ASSETS> 755,353,372
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 26,975,612
<OTHER-INCOME> 159,726
<EXPENSES-NET> 2,725,209
<NET-INVESTMENT-INCOME> 24,410,129
<REALIZED-GAINS-CURRENT> (9,083,532)
<APPREC-INCREASE-CURRENT> (93,055,873)
<NET-CHANGE-FROM-OPS> (77,729,276)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 9,148
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 2,318
<NUMBER-OF-SHARES-SOLD> 51,875
<NUMBER-OF-SHARES-REDEEMED> 16,899
<SHARES-REINVESTED> 378
<NET-CHANGE-IN-ASSETS> 399,141,824
<ACCUMULATED-NII-PRIOR> 8,762,384
<ACCUMULATED-GAINS-PRIOR> 1,156,628
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,705,602
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,725,209
<AVERAGE-NET-ASSETS> 471,580
<PER-SHARE-NAV-BEGIN> 31.64
<PER-SHARE-NII> 1.39
<PER-SHARE-GAIN-APPREC> (6.90)
<PER-SHARE-DIVIDEND> 1.23
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.31
<PER-SHARE-NAV-END> 26.13
<EXPENSE-RATIO> 0.84
</TABLE>
Report of Independent Accountants
To the Trustees and Shareholders of the American Century Target Maturities
Trust Funds: In planning and performing our audits of the financial statements
and financial highlights of the American Century Target Maturities Trust Funds
(the Funds) for the year ended September 30, 1999, we considered their
internal control, including control activities for safeguarding securities, in
order to determine our auditing procedures for the purpose of expressing our
opinion on the financial statements and to comply with the requirements of Form
N-SAR, not to provide assurance on internal control. The management of the Funds
is responsible for establishing and maintaining internal control. In fulfilling
this responsibility, estimates and judgments by management are required to
assess the expected benefits and related costs of controls. Generally, controls
that are relevant to an audit pertain to the entity's objective of preparing
financial statements for external purposes that are fairly presented in
conformity with generally accepted accounting principles. Those controls include
the safeguarding of assets against unauthorized acquisition, use or disposition.
Because of inherent limitations in internal control, errors or fraud may occur
and not be detected. Also, projection of any evaluation of internal control to
future periods is subject to the risk that it may become inadequate because of
changes in conditions or that the effectiveness of the design and operation may
deteriorate. Our consideration of internal control would not necessarily
disclose all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that misstatements caused by error or fraud in amounts that would
be material in relation to the financial statements being audited may occur and
not be detected within a timely period by employees in the normal course of
performing their assigned functions. However, we noted no matters involving
internal control and its operation, including controls for safeguarding
securities that we consider to be material weaknesses as defined above as of
September 30, 1999. This report is intended solely for the information and use
of management and the Securities and Exchange Commission. November 11, 1999
