AMERICAN CENTURY WORLD MUTUAL FUNDS INC
497K2, 1998-08-13
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                                  FUND PROFILE


                                  International
                                     Growth

                                 INVESTOR CLASS

                                 August 10, 1998

                         [american century logo(reg.sm)
                                    American
                                Century(reg.tm)

- --------------------------------------------------------------------------------
      This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes additional
      information about the fund,  including a more detailed  description of the
       risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
        accessing our Web site or visiting one of our Investor Centers.
       See the back cover for additional phone numbers and our address.

                             TWENTIETH CENTURY GROUP



                          AMERICAN CENTURY INVESTMENTS
                              INTERNATIONAL GROWTH

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        International  Growth seeks  capital  growth by  investing  primarily in
     foreign  equity  securities.  International  Growth  invests  primarily  in
     securities of issuers in developed countries.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund managers look for  securities of  international  companies that
     they believe will increase in value over time.  The managers use a "growth"
     investment  strategy developed by American Century that looks for companies
     whose  earnings  and  revenues  are not  only  growing,  but  growing  at a
     successively faster, or accelerating,  pace.  Accelerating growth is shown,
     for  example,  by growth that is faster this  quarter  than last and faster
     this year than the year before.

        Using American Century's extensive computer database, the managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  will be able to sustain  accelerating  growth.  This
     strategy is based on the premise  that,  over the long term,  the stocks of
     companies    with    accelerating    earnings   and    revenues    have   a
     greater-than-average chance to increase in value. International Growth will
     have at least 65% of its  assets  invested  at all  times in  international
     equity securities.

        In addition to locating strong companies with accelerating earnings, the
     fund  managers  believe  that the  diversification  of the fund's  holdings
     across different countries and geographical  regions is important in trying
     to manage the risks of an  international  portfolio.  For this reason,  the
     managers also consider the  prospects  for relative  economic  growth among
     countries or regions, economic and political conditions, expected inflation
     rates, currency exchange  fluctuations,  and tax considerations when making
     investments.

        Additional  information  about  International  Growth's  investments  is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.


3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of  International  Growth's  shares  depends  on the value of the
     stocks and other securities it owns. The value of the individual securities
     International  Growth owns will go up and down depending on the performance
     of the companies that issued them, general market and economic  conditions,
     and investor confidence.

    *As with  all  funds,  at any  given  time,  the  value  of your  shares  of
     International  Growth may be worth more or less than the price you paid. If
     you sell your  shares  when the value is less than the price you paid,  you
     will lose  money.  Additionally,  an  investment  in the fund is not a bank
     deposit, nor is it insured by the Federal Deposit Insurance  Corporation or
     any other government agency.

    *International  Growth  invests  primarily   in  foreign  securities,  which
     generally involves greater risks than investing in U.S.  securities.  These
     risks are summarized below:

     Currency  Risk.  In  addition  to  changes  in  the  value  of  the  fund's
     investments,  changes in the value of foreign  currencies  against the U.S.
     dollar  also  could  result in gains or losses to the fund.  The value of a
     share of  International  Growth is determined in U.S.  dollars.  The fund's
     investments,  however,  generally  are held in the foreign  currency of the
     country where investments are made. As a result, the fund could recognize a
     gain or loss based  solely upon a change in the  exchange  rate between the
     foreign currency and the U.S. dollar.

     Political and Economic Risk.  Many countries where the fund invests are not
     as politically or economically developed as the United States. As a result,
     the economies and political and social  structures of these countries could
     be  unstable  and exert  forces  that  could  cause the value of the fund's
     investments  to  decrease.  The fund also  could be unable to  enforce  its
     ownership rights or pursue legal remedies in countries where it invests.

     Market and Trading Risk.  The trading  markets for many foreign  securities
     are not as active as U.S. markets and may have less governmental regulation
     and oversight. Foreign


International Growth                                American Century Investments


     markets also may have  clearance  and  settlement  procedures  that make it
     difficult  for the fund to buy and sell  securities.  These  factors  could
     result in a loss to the fund by causing the fund to be unable to dispose of
     an  investment,  by  causing  the  fund to miss  an  attractive  investment
     opportunity,  or by causing fund assets to be uninvested for some period of
     time.

     Availability of Information. Foreign companies generally are not subject to
     the  regulatory  controls or uniform  accounting,  auditing,  and financial
     reporting standards imposed on U.S. issuers. As a result, there may be less
     publicly  available  information  about  foreign  issuers than is available
     regarding U.S. issuers.

        In summary,  International  Growth is intended  for  investors  who find
     foreign securities an appropriate  investment and who are willing to accept
     the increased  risk  associated  with the fund's  investment  strategy.  An
     investment  in the fund  should not be  considered  a  complete  investment
     program and is not  appropriate  for  investors  who are unable to tolerate
     rapid fluctuations in the value of their investment.

     FUND PERFORMANCE

        The bar  chart  below  shows the  actual  performance  of  International
     Growth's  Investor  Class shares for each calendar year since its inception
     on May 9, 1991.  It  indicates  the  volatility  of the  fund's  historical
     returns from year to year. Neither it nor the quarterly  information in the
     next  column is  intended  to  indicate  how the fund will  perform  in the
     future.

[bar chart]
CALENDAR YEAR-BY-YEAR RETURNS
      1992       1993       1994       1995      1996       1997
      4.84       42.65     -4.76       11.89     14.43      19.72

     As of  June  30,  1998,  the  end  of the  most  recent  calendar  quarter,
     International Growth's year-to-date return was 25.89%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since the fund's inception on May 9, 1991, are provided in
     the chart in the next column to indicate  the fund's  potential  short-term
     volatility.  Shareholders  should be  aware,  however,  that  International
     Growth is intended for investors with a long-term investment horizon and is
     not managed for short-term results.

[bar chart]
     HIGHEST AND LOWEST QUARTERLY RETURNS
           Quarter Ended 12/31/93       18.32%
           Quarter Ended 12/31/94      - 5.86%

        The table below shows the average  annual return of the fund's  Investor
     Class  shares  for  the  periods  indicated.  The  Morgan  Stanley  Capital
     International Europe,  Australia, Far East (EAFE) Index, an unmanaged index
     that reflects no operating  costs,  is included for  long-term  performance
     comparisons.

                                1 YR.     5 YRS.      LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
         International Growth  25.75%     18.29%      16.77%
         MSCI EAFE Index        6.10%     10.03%       8.59%
                                                     (index as of 4/30/91)

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                1.37%(1)
           Distribution and Service (12b-1) Fees         None
           Other Expenses(2)                             0.00%
           Total Annual Fund Operating Expenses          1.37%(1)

        (1)Based  upon assets at November 30,  1997.  The fund has a stepped fee
        schedule.  As a result,  the fund's  management  fee  decreases  as fund
        assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent directors,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.


Fund Profile                                                International Growth


           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              *   invest $10,000 in the fund
              *   redeem your shares at the end of the periods shown below 
              *   earn a 5% return each year 
              *   incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

                  1 year      3 years      5 years     10 years
                  -----------------------------------------------
                   $140        $430         $750        $1,640

                 Of  course,  actual  costs may be  higher  or  lower.  Use this
           example to compare the costs of investing in other funds.


5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  managers  on the
     International Growth team are:

        HENRIK  STRABO,  Senior Vice  President  and Portfolio  Manager,  joined
     American Century in 1993 as an Investment Analyst. In 1995, he was promoted
     to Portfolio Manager.

        MARK  S.  KOPINSKI,  Vice  President  and  Portfolio  Manager,  rejoined
     American  Century  in  1997  following  two  years  as Vice  President  and
     Portfolio Manager of Federated Investors,  Inc. Prior to 1995, Mr. Kopinski
     served as Vice President and Portfolio Manager of American Century.

6. HOW DO I BUY FUND SHARES?

    *   Complete and return the enclosed application

    *   Call us and exchange shares from another American Century fund

    *   Call us and send your investment by bank wire transfer

        Your initial  investment  must be $2,500 ($1,000 for  traditional  IRAs,
     Roth IRAs and  UGMA/UTMA  accounts),  unless  you  establish  an  automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls below the account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling  us. You also may  exchange  your shares in the fund for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        International  Growth pays  distributions  of  substantially  all of its
     income  and  realized  capital  gains  once a year,  usually  in  December.
     Distributions  may be taxable  as  ordinary  income,  capital  gains,  or a
     combination  of the  two.  Capital  gains  are  taxed  at  different  rates
     depending  on the  length  of time the fund held the  securities  that were
     sold. Fund  shareholders also may be able to claim a foreign tax credit for
     any foreign  income taxes paid by the fund.  Distributions  are  reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

    *   telephone transactions

    *   wire and electronic funds transfers

    *   24-hour Automated Information Line transactions

    *   24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.


INTERNATIONAL GROWTH                               AMERICAN CENTURY INVESTMENTS


        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.


Fund Profile                                                International Growth


- ------------------------------------------------------------------------------

[american century logo(reg.sm)
            American
        Century(reg.tm)


AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765


INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-12616   9808
<PAGE>
                                  FUND PROFILE


                                  International
                                    Discovery

                                 INVESTOR CLASS

                                 August 10, 1998

                         [american century logo(reg.sm)
                                    American
                                Century(reg.tm)

- --------------------------------------------------------------------------------
       This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus includes additional
        information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
       to consider before you invest. You may obtain the Prospectus and other
        information about the fund at no cost by calling us at 1-800-345-2021,
           accessing our Web site or visiting one of our Investor Centers.
          See the back cover for additional phone numbers and our address.


                             TWENTIETH CENTURY GROUP



                          AMERICAN CENTURY INVESTMENTS
                             INTERNATIONAL DISCOVERY

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        International  Discovery seeks capital growth by investing  primarily in
     equity  securities of smaller foreign  companies.  These smaller  companies
     have a market  capitalization  (the number of shares times the share price)
     at the time of  investment  of less than $1  billion or will have less than
     $500 million in freely tradable securities. As much as one-half of the fund
     may be invested in emerging market countries.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund managers look for  securities of  international  companies that
     they believe will increase in value over time.  The managers use a "growth"
     investment  strategy developed by American Century that looks for companies
     whose  earnings  and  revenues  are not  only  growing,  but  growing  at a
     successively faster, or accelerating,  pace.  Accelerating growth is shown,
     for  example,  by growth that is faster this  quarter  than last and faster
     this year than the year before.

        Using American Century's extensive computer database, the managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  will be able to sustain  accelerating  growth.  This
     strategy is based on the premise  that,  over the long term,  the stocks of
     companies    with    accelerating    earnings   and    revenues    have   a
     greater-than-average chance to increase in value.

        In addition to locating strong companies with accelerating earnings, the
     fund  managers  believe  that the  diversification  of the fund's  holdings
     across different countries and geographical  regions is important in trying
     to manage the risks of an  international  portfolio.  For this reason,  the
     managers also consider the  prospects  for relative  economic  growth among
     countries or regions, economic and political conditions, expected inflation
     rates, currency exchange  fluctuations,  and tax considerations when making
     investments.

        Additional  information about International  Discovery's  investments is
     available in its annual and semiannual  reports.  In these reports you will
     find a discussion of the market  conditions and investment  strategies that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of International  Discovery's  shares depends on the value of the
     stocks and other securities it owns. The value of the individual securities
     International  Discovery  owns  will  go  up  and  down  depending  on  the
     performance of the companies that issued them,  general market and economic
     conditions, and investor confidence.

    *As with  all  funds,  at any  given  time,  the  value  of your  shares  of
     International  Discovery may be worth more or less than the price you paid.
     If you sell your shares when the value is less than the price you paid, you
     will lose  money.  Additionally,  an  investment  in the fund is not a bank
     deposit, nor is it insured by the Federal Deposit Insurance  Corporation or
     any other government agency.

    *International  Discovery  invests  primarily in smaller foreign issuers and
     may invest up to 50% of its assets in emerging market countries.  Investing
     in smaller foreign issuers,  especially those in emerging market countries,
     is much riskier  than  investing  in U.S.  companies  or even  investing in
     foreign securities generally. Smaller companies may have limited resources,
     trade  less  frequently,  and have  less  publicly  available  information.
     Smaller companies in emerging markets also may be subject to government and
     economic instability, the effect of which can be magnified by the country's
     financial  markets.  Each of these  potential  factors may cause the fund's
     investments to be extremely volatile and could result in significant losses
     to the fund.

    *In addition to the risks of investing in smaller foreign  companies,  there
     are many risks associated with foreign investing generally. These risks are
     summarized below:

     Currency  Risk.  In  addition  to  changes  in  the  value  of  the  fund's
     investments,  changes in the value of foreign  currencies  against the U.S.
     dollar  also  could  result in gains or losses to the fund.  The value of a
     share of International  Discovery is determined in U.S. dollars. The fund's
     investments, however, generally are held in the foreign


International Discovery                             American Century Investments


     currency of the country where  investments are made. As a result,  the fund
     could  recognize a gain or loss based  solely upon a change in the exchange
     rate between the foreign currency and the U.S. dollar.

     Political and Economic Risk.  Many countries where the fund invests are not
     as politically or economically developed as the United States. As a result,
     the economies and political and social  structures of these countries could
     be  unstable  and exert  forces  that  could  cause the value of the fund's
     investments  to  decrease.  The fund also  could be unable to  enforce  its
     ownership rights or pursue legal remedies in countries where it invests.

     Market and Trading Risk.  The trading  markets for many foreign  securities
     are not as active as U.S. markets and may have less governmental regulation
     and  oversight.  Foreign  markets also may have  clearance  and  settlement
     procedures that make it difficult for the fund to buy and sell  securities.
     These  factors could result in a loss to the fund by causing the fund to be
     unable  to  dispose  of an  investment,  by  causing  the  fund  to miss an
     attractive  investment  opportunity,  or  by  causing  fund  assets  to  be
     uninvested for some period of time.

     Availability of Information. Foreign companies generally are not subject to
     the  regulatory  controls or uniform  accounting,  auditing,  and financial
     reporting standards imposed on U.S. issuers. As a result, there may be less
     publicly  available  information  about  foreign  issuers than is available
     regarding U.S. issuers.

        In summary,  International  Discovery is intended for investors who find
     foreign securities an appropriate  investment and who are willing to accept
     the increased risk of investing in smaller foreign companies. An investment
     in the fund should not be considered a complete  investment  program and is
     not appropriate for investors who are unable to tolerate rapid fluctuations
     in the value of their investment.

     FUND PERFORMANCE

        The bar chart in the following  column shows the actual  performance  of
     International  Discovery's  Investor  Class shares for each  calendar  year
     since its inception on April 1, 1994.  It indicates  the  volatility of the
     fund's historical  returns from year to year.  Neither it nor the quarterly
     information  in the next column is  intended to indicate  how the fund will
     perform in the future.

[bar chart]
CALENDAR YEAR-BY-YEAR RETURNS
      1995        1996        1997
      9.89%      31.18%      17.48%

     As of  June  30,  1998,  the  end  of the  most  recent  calendar  quarter,
     International Discovery's year-to-date return was 29.45%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since the fund's inception on April 1, 1994, are provided
     in the chart below to indicate the fund's potential short-term  volatility.
     Shareholders  should be aware,  however,  that  International  Discovery is
     intended  for  investors  with a  long-term  investment  horizon and is not
     managed for short-term results.

[bar chart]
     HIGHEST AND LOWEST QUARTERLY RETURNS
        Quarter Ended 3/31/98       20.49%
        Quarter Ended 12/31/97     - 7.92%

        The table below shows the average  annual return of the fund's  Investor
     Class  shares  for  the  periods  indicated.  The  Morgan  Stanley  Capital
     International Europe,  Australia, Far East (EAFE) Index, an unmanaged index
     that reflects no operating  costs,  is included for  long-term  performance
     comparisons.

                                           1 YR.          LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
              International Discovery     28.95%             22.44%
              MSCI EAFE Index              6.10%              9.12%
                                                       (index as of 3/31/94)

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly  from  American  Century or to reinvest  dividends  in  additional
     shares.

        THE FUND  CHARGES A  REDEMPTION  FEE OF 2.0% OF THE VALUE OF THE  SHARES
     SOLD WITHIN 180 DAYS OF THEIR PURCHASE. This


Fund Profile                                             International Discovery


     redemption  fee is  retained  by the fund.  It is  intended  to  discourage
     short-term  investment  in the  fund as well as to  decrease  the  negative
     impact that short-term investors have on the shareholders  remaining in the
     fund. Otherwise, there are no fees or charges to exchange into the Investor
     Class shares of other American Century funds, or to redeem your shares. The
     following table describes the fees and expenses that you may pay if you buy
     and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                               1.68%(1)
           Distribution and Service (12b-1) Fees        None
           Other Expenses(2)                            0.00%
           Total Annual Fund Operating Expenses         1.68%(1)

        (1)Based  upon assets at November 30,  1997.  The fund has a stepped fee
        schedule.  As a result,  the fund's  management  fee  decreases  as fund
        assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent directors,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              *   invest $10,000 in the fund
              *   redeem your shares at the end of the periods shown below 
              *   earn a 5% return each year 
              *   incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

              1 year     3 years     5 years     10 years
              ---------------------------------------------
               $170       $530        $910        $1,970

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together  to  manage  our  mutual  funds.  The  portfolio  managers  on the
     International Discovery team are:

        HENRIK  STRABO,  Senior Vice  President  and Portfolio  Manager,  joined
     American Century in 1993 as an Investment Analyst. In 1995, he was promoted
     to Portfolio Manager.

        MARK  S.  KOPINSKI,  Vice  President  and  Portfolio  Manager,  rejoined
     American  Century  in  1997  following  two  years  as Vice  President  and
     Portfolio Manager at Federated Investors,  Inc. Prior to 1995, Mr. Kopinski
     served as Vice President and Portfolio Manager of American Century.

6. HOW DO I BUY FUND SHARES?

     *    Complete and return the enclosed application

     *    Call us and exchange shares from another American Century fund

     *    Call us and send your investment by bank wire transfer

        Your initial  investment  must be $10,000.  If the value of your account
     falls below the account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling us. You also may exchange  your shares in  International
     Discovery  for shares in nearly 70 other mutual  funds  offered by American
     Century.  Depending  on the options you select when you open your  account,
     some restrictions may apply. For your protection,  some redemption requests
     require a signature guarantee.

        IF YOU SELL SHARES OF  INTERNATIONAL  DISCOVERY WITHIN 180 DAYS OF THEIR
     PURCHASE,  YOU WILL PAY A REDEMPTION FEE OF 2.0% OF THE VALUE OF THE SHARES
     SOLD.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        International  Discovery pays  distributions of substantially all of its
     income  and  realized  capital  gains  once a year,  usually  in  December.
     Distributions  may be taxable  as  ordinary  income,  capital  gains,  or a
     combination  of the  two.  Capital  gains  are  taxed  at  different  rates
     depending  on the  length  of time the fund held the  securities  that were
     sold. Fund  shareholders also may be able to claim a foreign tax credit for
     any foreign  income taxes paid by the fund.  Distributions  are  reinvested
     automatically in additional shares unless you choose another option.


International Discovery                             American Century Investments


9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     *    telephone transactions

     *    wire and electronic funds transfers

     *    24-hour Automated Information Line transactions

     *    24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.


Fund Profile                                             International Discovery


- --------------------------------------------------------------------------------

[american century logo(reg.sm)
            American
        Century(reg.tm)


AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765


INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-12617   9808
<PAGE>
                                  FUND PROFILE


                                Emerging Markets

                                 INVESTOR CLASS

                                 August 10, 1998


                         [american century logo(reg.sm)
                                    American
                                Century(reg.tm)

- --------------------------------------------------------------------------------
      This profile summarizes key information about the fund that is included
        in the fund's Prospectus. The fund's Prospectus includes additional
       information about the fund,  including a more detailed description of the
        risks associated with investing in the fund, that you may want
      to consider before you invest. You may obtain the Prospectus and other
       information about the fund at no cost by calling us at 1-800-345-2021,
          accessing our Web site or visiting one of our Investor Centers.
          See the back cover for additional phone numbers and our address.


                             TWENTIETH CENTURY GROUP



                          AMERICAN CENTURY INVESTMENTS
                                EMERGING MARKETS

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Emerging  Markets seeks capital growth by investing  primarily in equity
     securities of emerging market companies. The fund considers emerging market
     companies  to  be  companies  located  in  emerging  market  countries  and
     companies that derive a significant portion of their business from emerging
     market countries.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund managers look for securities of emerging market  companies that
     they believe will increase in value over time.  The managers use a "growth"
     investment  strategy developed by American Century that looks for companies
     whose  earnings  and  revenues  are not  only  growing,  but  growing  at a
     successively faster, or accelerating,  pace.  Accelerating growth is shown,
     for  example,  by growth that is faster this  quarter  than last and faster
     this year than the year before.

        Using American Century's extensive computer database, the managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  will be able to sustain  accelerating  growth.  This
     strategy is based on the premise  that,  over the long term,  the stocks of
     companies    with    accelerating    earnings   and    revenues    have   a
     greater-than-average chance to increase in value.

        In addition to locating strong companies with accelerating earnings, the
     fund  managers  believe  that the  diversification  of the fund's  holdings
     across different countries and geographical  regions is important in trying
     to manage the risks of an inter-national  portfolio.  For this reason,  the
     managers also consider the  prospects  for relative  economic  growth among
     countries or regions, economic and political conditions, expected inflation
     rates, currency exchange  fluctuations,  and tax considerations when making
     investments.

        Additional  information about Emerging Markets' investments is available
     in its annual and  semiannual  reports.  In these  reports  you will find a
     discussion  of  the  market  conditions  and  investment   strategies  that
     significantly  affected  the  fund's  performance  during  the most  recent
     six-month period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of Emerging  Markets'  shares  depends on the value of the stocks
     and  other  securities  it owns.  The  value of the  individual  securities
     Emerging  Markets owns will go up and down depending on the  performance of
     the companies that issued them, general market and economic conditions, and
     investor confidence.

    *As with all funds,  at any given time, the value of your shares of Emerging
     Markets may be worth more or less than the price you paid. If you sell your
     shares when the value is less than the price you paid, you will lose money.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  by  the  Federal  Deposit  Insurance   Corporation  or  any  other
     government agency.

    *Emerging Markets invests primarily in emerging market companies.  Investing
     in  emerging  market  companies  is much  riskier  than  investing  in U.S.
     companies  or even  investing  in foreign  securities  generally.  Emerging
     market countries may have extremely  unstable  governments and/or economies
     that are subject to sudden  change.  These  changes may be magnified by the
     country's  financial  markets  resulting in  significant  volatility in the
     fund's investments.  In addition to the risks of emerging market companies,
     there are many risks  associated with foreign  investing  generally.  These
     risks are summarized below:

     Currency  Risk.  In  addition  to  changes  in  the  value  of  the  fund's
     investments,  changes in the value of foreign  currencies  against the U.S.
     dollar  also  could  result in gains or losses to the fund.  The value of a
     share of  Emerging  Markets  is  determined  in U.S.  dollars.  The  fund's
     investments,  however,  generally  are held in the foreign  currency of the
     country where investments are made. As a result, the fund could recognize a
     gain or loss based  solely upon a change in the  exchange  rate between the
     foreign currency and the U.S. dollar.

     Political and Economic Risk.  Many countries where the fund invests are not
     as politically or economically developed as the United States. As a result,
     the economies and political and social  structures of these countries could
     be


Emerging Markets                                    American Century Investments


     unstable  and  exert  forces  that  could  cause  the  value of the  fund's
     investments  to  decrease.  The fund also  could be unable to  enforce  its
     ownership rights or pursue legal remedies in countries where it invests.

     Market and Trading Risk.  The trading  markets for many foreign  securities
     are not as active as U.S. markets and may have less governmental regulation
     and  oversight.  Foreign  markets also may have  clearance  and  settlement
     procedures that make it difficult for the fund to buy and sell  securities.
     These  factors could result in a loss to the fund by causing the fund to be
     unable  to  dispose  of an  investment,  by  causing  the  fund  to miss an
     attractive  investment  opportunity,  or  by  causing  fund  assets  to  be
     uninvested for some period of time.

     Availability of Information. Foreign companies generally are not subject to
     the  regulatory  controls or uniform  accounting,  auditing,  and financial
     reporting standards imposed on U.S. issuers. As a result, there may be less
     publicly  available  information  about  foreign  issuers than is available
     regarding U.S. issuers.

        In summary,  Emerging Markets is intended for investors who find foreign
     securities  an  appropriate  investment  and who are  willing to accept the
     increased risk of investing in emerging market companies.  An investment in
     the fund should not be considered a complete  investment program and is not
     appropriate for investors who are unable to tolerate rapid  fluctuations in
     the value of their investment.

     FUND PERFORMANCE

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter  since the fund's  inception on September  30, 1997,  are
     provided  in the chart below to indicate  the fund's  potential  short-term
     volatility. Shareholders should be aware, however, that Emerging Markets is
     intended  for  investors  with a  long-term  investment  horizon and is not
     managed for short-term results.

[bar chart]
     HIGHEST AND LOWEST QUARTERLY RETURNS
        Quarter Ended 3/31/98          8.37%
        Quarter Ended 12/31/97       -16.40%

        The table below shows the average  annual return of the fund's  Investor
     Class shares since its inception on September 30, 1997.  The Morgan Stanley
     Capital International  Emerging Markets Free Index, an unmanaged index that
     reflects  no  operating  costs,  is  included  for  long-term   performance
     comparisons.

                                                           LIFE OF FUND
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)  
                   Emerging Markets                          -22.00%
                   Morgan Stanley Capital International
                     Emerging Markets Free Index             -33.08%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American Century funds,
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

      ANNUAL FUND OPERATING EXPENSES
      (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
           Management Fee                                    2.00%(1)
           Distribution and Service (12b-1) Fees             None
           Other Expenses(2)                                 0.00%
           Total Annual Fund Operating Expenses              2.00%(1)

        (1)Based  upon assets at November 30,  1997.  The fund has a stepped fee
        schedule.  As a result,  the fund's  management  fee  decreases  as fund
        assets increase.

        (2)Other  expenses,  which  include the fees and  expenses of the fund's
        independent directors,  their legal counsel,  interest and extraordinary
        expenses, were less than 0.005% for the most recent fiscal year.


           EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              *   invest $10,000 in the fund
              *   redeem your shares at the end of the periods shown below 
              *   earn a 5% return each year 
              *   incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

              1 year    3 years     5 years    10 years
              --------------------------------------------
               $200      $620        $1,070     $2,310

               Of course,  actual costs may be higher or lower. Use this example
           to compare the costs of investing in other funds.


Fund Profile                                                   Emerging Markets


5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage our mutual funds. The portfolio managers on the Emerging
     Markets team are:

        MARK  S.  KOPINSKI,  Vice  President  and  Portfolio  Manager,  rejoined
     American  Century  in  1997  following  two  years  as Vice  President  and
     Portfolio Manager of Federated Investors,  Inc. Prior to 1995, Mr. Kopinski
     served as Vice President and Portfolio Manager of American Century.

        MICHAEL J.  DONNELLY,  Vice  President  and  Portfolio  Manager,  joined
     American  Century in 1997.  From 1993 to 1997, Mr.  Donnelly served as Vice
     President and  Portfolio  Manager for Federated  Investors,  Inc.  Prior to
     1993, Mr. Donnelly served as Assistant Vice President for First Korea Bank.

6. HOW DO I BUY FUND SHARES?

     *    Complete and return the enclosed application

     *    Call us and exchange shares from another American Century fund

     *    Call us and send your investment by bank wire transfer

        Your initial  investment  must be $10,000.  If the value of your account
     falls below the account minimum, your shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling  us. You also may  exchange  your shares in the fund for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Emerging Markets pays  distributions of substantially  all of its income
     and realized capital gains once a year, usually in December.  Distributions
     may be taxable as ordinary  income,  capital gains, or a combination of the
     two.  Capital gains are taxed at different rates depending on the length of
     time the fund held the securities  that were sold. Fund  shareholders  also
     may be able to claim a foreign tax credit for any foreign income taxes paid
     by the fund.  Distributions  are  reinvested  automatically  in  additional
     shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     *    telephone transactions

     *    wire and electronic funds transfers

     *    24-hour Automated Information Line transactions

     *    24-hour online Internet account access and transactions

        You may find  more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds,  and redeem  them will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg.sm)
            American
        Century(reg.tm)


AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765


INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.
                                  (c) 1998 American Century Services Corporation

SH-BRO-12618   9808


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