MORGAN STANLEY DEAN WITTER TECHNOLOGY FUND
497, 2000-09-25
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<PAGE>
                                                Filed Pursuant to Rule 497(e)
                                                Registration File No.: 333-39494





                                                   PROSPECTUS - AUGUST 17, 2000

Morgan Stanley Dean Witter



                                                                TECHNOLOGY FUND



                        A MUTUAL FUND THAT SEEKS LONG-TERM CAPITAL APPRECIATION

The Securities and Exchange Commission has not approved or disapproved these
           securities or passed upon the adequacy of this Prospectus.
            Any representation to the contrary is a criminal offense.


<PAGE>




CONTENTS

<TABLE>
<S>                         <C>
The Fund                    Investment Objective.............................  1
                            Principal Investment Strategies..................  1
                            Principal Risks..................................  2
                            Fees and Expenses................................  4
                            Additional Investment Strategy Information.......  5
                            Additional Risk Information......................  6
                            Fund Management..................................  7

Shareholder Information     Pricing Fund Shares..............................  9
                            Underwriting.....................................  9
                            How to Buy Shares................................ 10
                            How to Exchange Shares........................... 12
                            How to Sell Shares............................... 14
                            Distributions.................................... 16
                            Tax Consequences................................. 16
                            Share Class Arrangements......................... 17

Our Family of Funds         .................................. Inside Back Cover

                            This Prospectus contains important information about
                            the Fund. Please read it carefully and keep it for
                            future reference.
</TABLE>


<PAGE>




THE FUND


[GRAPHIC OMITTED]


         INVESTMENT OBJECTIVE
-----------------------------------------
         Morgan Stanley Dean Witter Technology Fund seeks long-term capital
         appreciation.




[GRAPHIC OMITTED]


         PRINCIPAL INVESTMENT STRATEGIES
-----------------------------------------
          The Fund will normally invest at least 65% of its total assets in
          common stocks of companies of any asset size engaged in technology and
          technology-related industries. These include a wide range of
          industries such as computers; software and peripheral products;
          electronics; communications equipment and services; internet;
          telecommunications; entertainment; multimedia; and information
          services. A company will be considered engaged in technology or
          technology-related industries if it derives at least 50% of its
          revenues or earnings from those industries or it devotes at least 50%
          of its assets to those industries.

[sidebar]
CAPITAL APPRECIATION
An investment objective having the goal of selecting securities with the
potential to rise in price rather than pay out income.
[end sidebar]

          When selecting investments for the Fund's portfolio, the Fund's
          "Sub-Advisor," Morgan Stanley Dean Witter Investment Management Inc.,
          extensively researches technology trends in order to identify
          particular sectors and issuers it views to have strong growth
          prospects. The Sub-Advisor first seeks to identify sectors that are
          expected to benefit from anticipated shifts in fundamental patterns
          in the technology and technology-related industries. The Sub-Advisor
          then looks to invest in issuers that are believed to be leaders in
          their respective industries, with strong management teams, reasonable
          valuations relative to growth prospects and whose competitors face
          barriers to market entry. In deciding whether to sell a particular
          security, the Sub-Advisor considers a number of factors, including
          changing technology trends, unfavorable earnings revisions or
          estimates, negative fundamental information, excessive market
          valuations in relation to growth prospects, changes in the issuer's
          financial condition or industry position, and general economic and
          market conditions.

          Common stock is a share ownership or equity interest in a
          corporation. It may or may not pay dividends, as some companies
          reinvest all of their profits back into their businesses, while
          others pay out some of their profits to shareholders as dividends.

          The Fund may invest up to 35% of its total assets in foreign
          securities, including emerging market securities. This percentage
          limitation, however, does not apply to securities of foreign
          companies, including depository receipts, that are listed in the U.S.
          on a national securities exchange.

          In addition, the Fund may invest in fixed-income and convertible
          securities and forward currency contracts.


                                                                               1


<PAGE>





          In pursuing the Fund's investment objective, the Sub-Advisor has
          considerable leeway in deciding which investments it buys, holds or
          sells on a day-to-day basis -- and which trading or investment
          strategies it uses. For example, the Sub-Advisor in its discretion
          may determine to use some permitted trading or investment strategies
          while not using others.


[GRAPHIC OMITTED]


          PRINCIPAL RISKS
-----------------------------------------
          There is no assurance that the Fund will achieve its investment
          objective. The Fund's share price will fluctuate with changes in the
          market value of the Fund's portfolio securities. When you sell Fund
          shares, they may be worth less than what you paid for them and,
          accordingly, you can lose money investing in this Fund.

          Technology-Oriented Companies. Because of the concentration of the
          Fund's investments in companies that are involved in technology and
          technology-related industries, the value of the Fund's shares may be
          substantially more volatile than the share value of funds that do not
          invest in technology-oriented companies. The technology sector is a
          rapidly changing field, and stocks of these companies may be subject
          to more abrupt or erratic market movements than the stock market in
          general. The products and services of technology-oriented companies
          may be subject to rapid obsolescence as a result of greater
          competition, advancing technological developments, and changing
          market and consumer preferences. In addition, these companies may
          have limited product lines, markets or financial resources and the
          management of such companies may be more dependent upon one or a few
          key people. As a result, the securities of these companies may
          exhibit substantially greater price volatility than those of
          companies in other industries.

          Common Stocks. A principal risk of investing in the Fund is
          associated with its common stock investments. In general, stock
          values fluctuate in response to activities specific to the company as
          well as general market, economic and political conditions. Stock
          prices can fluctuate widely in response to these factors.

          Small & Medium Capitalization Companies. The Fund's investments in
          smaller and medium-sized companies carry more risk than investments
          in larger companies. While some of the Fund's holdings in these
          companies may be listed on a national securities exchange, such
          securities are more likely to be traded in the over-the-counter
          market. The low market liquidity of these securities may have an
          adverse impact on the Fund's ability to sell certain securities at
          favorable prices and may also make it difficult for the Fund to
          obtain market quotations based on actual trades for purposes of
          valuing the Fund's securities. Investing in lesser-known, smaller and
          medium capitalization companies involves greater risk of volatility
          of the Fund's net asset value than is customarily associated with
          larger, more established companies. Often smaller and medium
          capitalization companies and the industries in which they are focused
          are still


2

<PAGE>




          evolving and, while this may offer better growth potential than
          larger, more established companies, it also may make them more
          sensitive to changing market conditions.

          Foreign Securities. The Fund's investments in foreign securities may
          involve risks in addition to the risks associated with domestic
          securities. One additional risk is currency risk. While the price of
          Fund shares is quoted in U.S. dollars, the Fund generally converts
          U.S. dollars to a foreign market's local currency to purchase a
          security in that market. If the value of that local currency falls
          relative to the U.S. dollar, the U.S. dollar value of the foreign
          security will decrease. This is true even if the foreign security's
          local price remains unchanged.

          Foreign securities (including depository receipts) also have risks
          related to economic and political developments abroad, including
          expropriations, confiscatory taxation, exchange control regulation,
          limitations on the use or transfer of Fund assets and any effects of
          foreign social, economic or political instability. Foreign companies,
          in general, are not subject to the regulatory requirements of U.S.
          companies and, as such, there may be less publicly available
          information about these companies. Moreover, foreign accounting,
          auditing and financial reporting standards generally are different
          from those applicable to U.S. companies.

          Securities of foreign issuers may be less liquid than comparable
          securities of U.S. issuers and, as such, their price changes may be
          more volatile. Furthermore, foreign exchanges and broker-dealers are
          generally subject to less government and exchange scrutiny and
          regulation than their U.S. counterparts. In addition, differences in
          clearance and settlement procedures in foreign markets may occasion
          delays in settlements of the Fund's trades effected in those markets.


          Certain foreign securities in which the Fund may invest may be issued
          by companies located in developing or emerging countries. Compared to
          the United States and other developed countries, developing or
          emerging countries may have unstable governments, economies based on
          only a few industries and securities markets that trade a small
          number of securities. Securities issued by companies located in these
          countries tend to be especially volatile and may be less liquid than
          securities traded in developed countries. In the past, securities in
          these countries have offered greater potential loss (as well as gain)
          than securities of companies located in developed countries.

          Non-Diversified Status. The Fund is a "non-diversified" mutual fund
          and, as such, its investments are not required to meet certain
          diversification requirements under federal law. Compared with
          "diversified" funds, the Fund may invest a greater percentage of its
          assets in the securities of an individual corporation or governmental
          entity. Thus, the Fund's assets may be concentrated in fewer
          securities than other funds. A decline in the value of those
          investments would cause the Fund's overall value to decline to a
          greater degree.


                                                                               3


<PAGE>






          Other Risks. The performance of the Fund also will depend on whether
          the Sub-Advisor is successful in pursuing the Fund's investment
          strategies. The Fund is subject to other risks from its permissible
          investments including the risks associated with fixed-income and
          convertible securities and forward currency contracts. For more
          information about these risks, see the "Additional Risk Information"
          section.

          Shares of the Fund are not bank deposits and are not guaranteed or
          insured by the FDIC or any other government agency.




[GRAPHIC OMITTED]


          FEES AND EXPENSES
-----------------------------------------
          The table below briefly describes the fees and expenses that you may
          pay if you buy and hold shares of the Fund. The Fund offers four
          classes of shares: Classes A, B, C and D. Each Class has a different
          combination of fees, expenses and other features. The Fund does not
          charge account or exchange fees. See the "Share Class Arrangements"
          section for further fee and expense information.

[sidebar]
SHAREHOLDER FEES
These fees are paid directly from your investment.
[end sidebar]

[sidebar]
ANNUAL FUND
OPERATING EXPENSES
These expenses are deducted from the Fund's assets.
[end sidebar]


<TABLE>
<CAPTION>
                                                     CLASS A      CLASS B      CLASS C     CLASS D
-----------------------------------------------------------------------------------------------------
<S>                                               <C>          <C>          <C>          <C>
  SHAREHOLDER FEEES
  Maximum sales charge (load) imposed on
  purchases (as a percentage of offering price)        5.25%(1)   None          None        None
-----------------------------------------------------------------------------------------------------
  Maximum deferred sales charge (load) (as a
  percentage based on the lesser of the offering
  price or net asset value at redemption)               None(2)   5.00%(3)      1.00%(4)    None
-----------------------------------------------------------------------------------------------------
  ANNUAL FUND OPERATING EXPENSES
-----------------------------------------------------------------------------------------------------
  Management fee(5)                                    1.00%      1.00%         1.00%       1.00%
-----------------------------------------------------------------------------------------------------
  Distribution and service (12b-1) fees                0.25%      1.00%         1.00%       None
-----------------------------------------------------------------------------------------------------
  Other expenses(5),(6)                                0.32%      0.32%         0.32%       0.32%
-----------------------------------------------------------------------------------------------------
  Total annual Fund operating expenses(5)              1.57%      2.32%         2.32%       1.32%
-----------------------------------------------------------------------------------------------------
</TABLE>

1 Reduced for purchases of $25,000 and over.
2 Investments that are not subject to any sales charge at the time of purchase
  are subject to a contingent deferred sales charge ("CDSC") of 1.00% that will
  be imposed if you sell your shares within one year after purchase, except for
  certain specific circumstances.
3 The CDSC is scaled down to 1.00% during the sixth year, reaching zero
  thereafter. See "Share Class Arrangements" for a complete discussion of the
  CDSC.
4 Only applicable if you sell your shares within one year after purchase.
5 The Investment Manager has agreed to assume all operating expenses (except
  for brokerage and 12b-1 fees) and waive the compensation provided in its
  investment management agreement until such time as the Fund has $50 million
  of net assets or until six months from the date of commencement of the Fund's
  operations, whichever occurs first. The expenses and fees disclosed above do
  not reflect the assumption of any expenses or the waiver of any compensation
  by the Investment Manager.
6 "Other Expenses" are estimated based on expenses anticipated for the first
  complete fiscal year of the Fund.

4


<PAGE>







          EXAMPLE

          This example is intended to help you compare the cost of investing in
          the Fund with the cost of investing in other mutual funds.


          The example assumes that you invest $10,000 in the Fund, your
          investment has a 5% return each year, and the Fund's operating
          expenses remain the same. Although your actual costs may be higher or
          lower, the tables below show your costs at the end of each period
          based on these assumptions depending upon whether or not you sell
          your shares at the end of each period.

<TABLE>
<CAPTION>
                IF YOU SOLD YOUR      IF YOU HELD YOUR
                    SHARES:                SHARES:
-----------------------------------  ---------------------
               1 YEAR     3 YEARS     1 YEAR     3 YEARS
-----------------------------------  ---------------------
<S>           <C>        <C>         <C>        <C>
  CLASS A       $676      $  995       $676       $995
-----------------------------------  ---------------------
  CLASS B       $735      $1,024       $235       $724
-----------------------------------  ---------------------
  CLASS C       $335      $  724       $235       $724
-----------------------------------  ---------------------
  CLASS D       $134      $  418       $134       $418
-----------------------------------  ---------------------
</TABLE>

          Long-term shareholders of Class B and Class C may pay more in sales
          charges, including distribution fees, than the economic equivalent of
          the maximum front-end sales charges permitted by the NASD.


          The Fund was recently organized and as of the date of this Prospectus
          had no historical performance to report.




[GRAPHIC OMITTED]


          ADDITIONAL INVESTMENT STRATEGY INFORMATION
-----------------------------------------------------------
          This section provides additional information relating to the Fund's
          principal investment strategies.


          Convertible Securities and Fixed-Income Securities. The Fund may
          invest up to 35% of its total assets in convertible securities,
          preferred securities, U.S. government securities, fixed-income
          securities issued by foreign governments and international
          organizations and investment grade corporate debt securities
          (including zero coupon securities).


          Forward Currency Contracts. The Fund's investments also may include
          forward currency contracts, which involve the purchase or sale of a
          specific amount of foreign currency at the current price with
          delivery at a specified future date. The Fund may use these contracts
          to hedge against adverse price movements in its portfolio securities
          and the currencies in which they are denominated.


          Defensive Investing. The Fund may take temporary "defensive"
          positions that are inconsistent with the Fund's principal investment
          strategies in attempting to respond to adverse market conditions. The
          Fund may invest any amount of its total assets in cash


                                                                               5


<PAGE>






          or money market instruments in a defensive posture when the
          Sub-Advisor believes it is advisable to do so. Although taking a
          defensive posture is designed to protect the Fund from an anticipated
          market downturn, it could have the effect of reducing the benefit
          from any upswing in the market. When the Fund takes a defensive
          position, it may not achieve its investment objective.


          Portfolio Turnover. The Fund may engage in active and frequent
          trading of its portfolio securities. The Fund's portfolio turnover
          rate may exceed 250%. A portfolio turnover rate of 200%, for example,
          is equivalent to the Fund buying and selling all of its securities
          two times during the course of the year. A high portfolio turnover
          rate (over 100%) could result in high brokerage costs and an increase
          in taxable capital gains distributions to the Fund's shareholders.
          See the sections on "Distributions" and "Tax Consequences."


          The percentage limitations relating to the composition of the Fund's
          portfolio apply at the time the Fund acquires an investment and refer
          to the Fund's net assets, unless otherwise noted. Subsequent
          percentage changes that result from market fluctuations will not
          require the Fund to sell any portfolio security. The Fund may change
          its principal investment strategies without shareholder approval;
          however, you would be notified of any changes.




[GRAPHIC OMITTED]


          ADDITIONAL RISK INFORMATION
-----------------------------------------
          This section provides additional information relating to the
          principal risks of investing in the Fund.


          Fixed-Income and Convertible Securities. Principal risks of investing
          in the Fund are associated with its fixed-income and convertible
          securities investments. All fixed-income securities, such as
          corporate debt, are subject to two types of risk: credit risk and
          interest rate risk. Credit risk refers to the possibility that the
          issuer of a security will be unable to make interest payments and/or
          repay the principal on its debt.


          Interest rate risk refers to fluctuations in the value of a
          fixed-income security resulting from changes in the general level of
          interest rates. When the general level of interest rates goes up, the
          prices of most fixed-income securities go down. When the general
          level of interest rates goes down, the prices of most fixed-income
          securities go up. (Zero coupon securities are typically subject to
          greater price fluctuations than comparable securities that pay
          interest.)


          The Fund's investments in convertible securities subject the Fund to
          the risks associated with both fixed-income securities and common
          stocks. Convertible securities are securities that generally pay
          interest and may be converted into common stock. To the extent that a
          convertible security's investment value is greater than its
          conversion value, its price will be likely to increase when interest
          rates fall and decrease when


6

<PAGE>





          interest rates rise, as with a fixed-income security. If the
          conversion value exceeds the investment value, the price of the
          convertible security will tend to fluctuate directly with the price
          of the underlying equity security. Because there are no credit
          quality restrictions concerning the Fund's convertible securities
          investments, a portion of these securities may include junk bonds,
          which have speculative characteristics.


          Forward Currency Contracts. The Fund's participation in forward
          currency contracts also involves risks. If the Sub-Advisor employs a
          strategy that does not correlate well with the Fund's investments or
          the currencies in which the investments are denominated, currency
          contracts could result in a loss. The contracts also may increase the
          Fund's volatility and may involve a significant risk.




[GRAPHIC OMITTED]


          FUND MANAGEMENT
-----------------------------------------
          The Fund has retained the Investment Manager -- Morgan Stanley Dean
          Witter Advisors Inc. -- to provide administrative services and manage
          its business affairs. The Investment Manager has, in turn, contracted
          with the Sub-Advisor -- Morgan Stanley Dean Witter Investment
          Management Inc. -- to invest the Fund's assets, including the placing
          of orders for the purchase and sale of portfolio securities. The
          Investment Manager is a wholly-owned subsidiary of Morgan Stanley Dean
          Witter & Co., a preeminent global financial services firm that
          maintains leading market positions in each of its three primary
          businesses: securities, asset management and credit services. Its main
          business office is located at Two World Trade Center, New York, NY
          10048.


[sidebar]
MORGAN STANLEY DEAN
WITTER ADVISORS INC.
The Investment Manager is widely recognized as a leader in the mutual fund
industry and together with Morgan Stanley Dean Witter Services Company Inc.,
its wholly-owned subsidiary, had approximately $150 billion in assets under
management as of July 31, 2000.
[end sidebar]

          The Sub-Advisor, together with its institutional investment management
affiliates, manages more than $179 billion primarily for employee benefit plans,
investment companies, endowments, foundations and wealthy individuals. The
Sub-Advisor also is a wholly-owned subsidiary of Morgan Stanley Dean Witter &
Co. Its main business office is located at 1221 Avenue of the Americas, New
York, NY 10020.


          The Fund's portfolio is managed within the Sub-Advisor's Institutional
          Equity Group. Alexander L. Umansky and Dennis Lynch, each a Vice
          President of the Sub-Advisor, are the primary portfolio managers of
          the Fund. Mr. Umansky joined the Sub-Advisor in 1994 as a compliance
          analyst, became a research analyst in the Institutional Equity Group
          in 1996 and a portfolio manager in the Institutional Equity Group in
          1998 focusing primarily on technology. Mr. Lynch joined the
          Sub-Advisor in 1998 as a research analyst and has been a portfolio
          manager in the Institutional Equity Group since January, 1999. Prior
          to joining the Sub-Advisor, Mr. Lynch worked as a research


                                                                               7


<PAGE>





          analyst for JP Morgan Securities from 1994 to 1996 and was a student
          at Columbia University from 1996 to 1998, where he obtained his
          M.B.A.


          The Fund pays the Investment Manager a monthly management fee as full
          compensation for the services and facilities furnished to the Fund,
          and for Fund expenses assumed by the Investment Manager. The fee is
          calculated at the annual rate of 1.0% of the Fund's average daily net
          assets. The Investment Manager pays the Sub-Advisor compensation
          equal to 40% of this fee.


8

<PAGE>




SHAREHOLDER INFORMATION


[GRAPHIC OMITTED]


          PRICING FUND SHARES
-----------------------------------------
          The price of Fund shares (excluding sales charges), called "net asset
          value," is based on the value of the Fund's portfolio securities.
          While the assets of each Class are invested in a single portfolio of
          securities, the net asset value of each Class will differ because the
          Classes have different ongoing distribution fees.


          The net asset value per share of the Fund is determined once daily at
          4:00 p.m. Eastern time on each day that the New York Stock Exchange
          is open (or, on days when the New York Stock Exchange closes prior to
          4:00 p.m., at such earlier time). Shares will not be priced on days
          that the New York Stock Exchange is closed.


          The value of the Fund's portfolio securities is based on the
          securities' market price when available. When a market price is not
          readily available, including circumstances under which the Investment
          Manager and/or Sub-Advisor determine that a security's market price
          is not accurate, a portfolio security is valued at its fair value, as
          determined under procedures established by the Fund's Board of
          Trustees. In these cases, the Fund's net asset value will reflect
          certain portfolio securities' fair value rather than their market
          price. With respect to securities that are primarily listed on
          foreign exchanges, the value of the Fund's portfolio securities may
          change on days when you will not be able to purchase or sell your
          shares.


          An exception to the Fund's general policy of using market prices
          concerns its short-term debt portfolio securities. Debt securities
          with remaining maturities of sixty days or less at the time of
          purchase are valued at amortized cost. However, if the cost does not
          reflect the securities' market value, these securities will be valued
          at their fair value.




[GRAPHIC OMITTED]


          UNDERWRITING
-----------------------------------------
          The Fund will initially offer its shares from approximately September
          25, 2000 through October 24, 2000 in an underwriting by the Fund's
          Distributor, Morgan Stanley Dean Witter Distributors Inc., as the
          Fund's principal underwriter. During this period, you may place
          orders to buy shares through the Distributor, however, shares will
          not be issued until the Closing Date, which will take place on
          October 27, 2000 or on such later date as agreed upon by the Fund and
          the Distributor. You are not obligated to pay for the shares prior to
          the Closing Date. If any orders are accompanied by payment, the
          payment will be returned to you, unless you request that such payment
          be invested in a Morgan Stanley Dean Witter Money Market Fund. In
          such case the funds will be automatically transferred from the Money
          Market Fund to the Fund on the Closing Date. You may cancel your
          order to purchase shares without penalty at any time prior to the
          Closing Date. A continuous offering of the Fund's shares will begin
          approximately two weeks after the Closing Date.


                                                                               9


<PAGE>






          The Distributor will purchase Class B, Class C and Class D shares
          from the Fund at $10.00 per share with all proceeds going to the Fund
          and will purchase Class A shares at $10.00 per share plus a sales
          charge with the sales charge paid to the Distributor and the net
          asset value of $10.00 per share going to the Fund. The Distributor
          may also receive contingent deferred sales charges from future
          redemptions of Class A, Class B and Class C shares.


          The minimum number of Fund shares which may be purchased by any
          shareholder during the initial offering period is 100 shares.
          Certificates for shares purchased will not be issued unless requested
          by the shareholder in writing.




[GRAPHIC OMITTED]


          HOW TO BUY SHARES
-----------------------------------------

          You may open a new account to buy Fund shares or buy additional Fund
          shares for an existing account by contacting your Morgan Stanley Dean
          Witter Financial Advisor or other authorized financial representative.
          Your Financial Advisor will assist you, step-by-step, with the
          procedures to invest in the Fund. You may also purchase shares
          directly by calling the Fund's transfer agent and requesting an
          application.

[sidebar]
CONTACTING A
FINANCIAL ADVISOR
If you are new to the Morgan Stanley Dean Witter Family of Funds and would like
to contact a Financial Advisor, call (877) 937-MSDW (toll-free) for the
telephone number of the Morgan Stanley Dean Witter office nearest you. You may
also access our office locator on our Internet site at:
www.msdwadvice.com/funds
[end sidebar]

          Because every investor has different immediate financial needs and
          long-term investment goals, the Fund offers investors four Classes of
          shares: Classes A, B, C and D. Class D shares are only offered to a
          limited group of investors. Each Class of shares offers a distinct
          structure of sales charges, distribution and service fees, and other
          features that are designed to address a variety of needs. Your
          Financial Advisor or other authorized financial representative can
          help you decide which Class may be most appropriate for you. When
          purchasing Fund shares, you must specify which Class of shares you
          wish to purchase.

          When you buy Fund shares, the shares are purchased at the next share
          price calculated (less any applicable front-end sales charge for
          Class A shares) after we receive your purchase order. Your payment is
          due on the third business day after you place your purchase order. We
          reserve the right to reject any order for the purchase of Fund
          shares.


10


<PAGE>







[sidebar]
EASYINVEST(Service Mark)
A purchase plan that allows you to transfer money automatically from your
checking or savings account or from a Money Market Fund on a semi-monthly,
monthly or quarterly basis. Contact your Morgan Stanley Dean Witter Financial
Advisor for further information about this service.
[end sidebar]


<TABLE>
<CAPTION>
  MINIMUM INVESTMENT AMOUNTS
--------------------------------------------------------------------------------
                                                        MINIMUM INVESTMENT
                                                     ---------------------------
  INVESTMENT OPTIONS                                   INITIAL     ADDITIONAL
--------------------------------------------------------------------------------
<S>                                 <C>              <C>         <C>
  Regular Accounts                                     $ 1,000      $  100
--------------------------------------------------------------------------------
  Individual Retirement Accounts:   Regular IRAs       $ 1,000      $  100
                                    Education IRAs     $   500      $  100
--------------------------------------------------------------------------------
  EasyInvest(Service Mark)
  (Automatically from your
  checking or savings account
  or Money Market Fund)                                $   100*     $  100*
--------------------------------------------------------------------------------
</TABLE>

*     Provided your schedule of investments totals $1,000 in twelve months.


          There is no minimum investment amount if you purchase Fund shares
          through: (1) the Investment Manager's mutual fund asset allocation
          plan, (2) a program, approved by the Fund's distributor, in which you
          pay an asset-based fee for advisory, administrative and/or brokerage
          services, or (3) employer-sponsored employee benefit plan accounts.


          Investment Options for Certain Institutional and Other
          Investors/Class D Shares. To be eligible to purchase Class D shares,
          you must qualify under one of the investor categories specified in
          the "Share Class Arrangements" section of this Prospectus.


          Subsequent Investments Sent Directly to the Fund. In addition to
          buying additional Fund shares for an existing account by contacting
          your Morgan Stanley Dean Witter Financial Advisor, you may send a
          check directly to the Fund. To buy additional shares in this manner:

           o  Write a "letter of instruction" to the Fund specifying the
              name(s) on the account, the account number, the social security or
              tax identification number, the Class of shares you wish to
              purchase, and the investment amount (which would include any
              applicable front-end sales charge). The letter must be signed by
              the account owner(s).

           o  Make out a check for the total amount payable to: Morgan Stanley
              Dean Witter Technology Fund.

           o  Mail the letter and check to Morgan Stanley Dean Witter Trust FSB
              at P.O. Box 1040, Jersey City, NJ 07303.


                                                                              11


<PAGE>







[GRAPHIC OMITTED]


          HOW TO EXCHANGE SHARES
-----------------------------------------
          Permissible Fund Exchanges. You may exchange shares of any Class of
          the Fund for the same Class of any other continuously offered
          Multi-Class Fund, or for shares of a No-Load Fund, a Money Market
          Fund, North American Government Income Trust or Short-Term U.S.
          Treasury Trust, without the imposition of an exchange fee. In
          addition, Class A shares of the Fund may be exchanged for shares of a
          FSC Fund (fund subject to a front-end sales charge). See the inside
          back cover of this Prospectus for each Morgan Stanley Dean Witter
          Fund's designation as a Multi-Class Fund, No-Load Fund, Money Market
          Fund or FSC Fund. If a Morgan Stanley Dean Witter Fund is not listed,
          consult the inside back cover of that fund's prospectus for its
          designation. For purposes of exchanges, shares of FSC Funds (subject
          to a front-end sales charge) are treated as Class A shares of a
          Multi-Class Fund.


          Exchanges may be made after shares of the Fund acquired by purchase
          have been held for thirty days. There is no waiting period for
          exchanges of shares acquired by exchange or dividend reinvestment.
          The current prospectus for each fund describes its investment
          objective(s), policies and investment minimum, and should be read
          before investment. Since exchanges are available only into
          continuously offered Morgan Stanley Dean Witter Funds, exchanges are
          not available into any new Morgan Stanley Dean Witter Fund during its
          initial offering period, or when shares of a particular Morgan
          Stanley Dean Witter Fund are not being offered for purchase.


          Exchange Procedures. You can process an exchange by contacting your
          Morgan Stanley Dean Witter Financial Advisor or other authorized
          financial representative. Otherwise, you must forward an exchange
          privilege authorization form to the Fund's transfer agent -- Morgan
          Stanley Dean Witter Trust FSB -- and then write the transfer agent or
          call (800) 869-NEWS to place an exchange order. You can obtain an
          exchange privilege authorization form by contacting your Financial
          Advisor or other authorized financial representative or by calling
          (800) 869-NEWS. If you hold share certificates, no exchanges may be
          processed until we have received all applicable share certificates.


          An exchange to any Morgan Stanley Dean Witter Fund (except a Money
          Market Fund) is made on the basis of the next calculated net asset
          values of the funds involved after the exchange instructions are
          accepted. When exchanging into a Money Market Fund, the Fund's shares
          are sold at their next calculated net asset value and the Money
          Market Fund's shares are purchased at their net asset value on the
          following business day.


          The Fund may terminate or revise the exchange privilege upon required
          notice. The check writing privilege is not available for Money Market
          Fund shares you acquire in an exchange.


          Telephone Exchanges. For your protection when calling Morgan Stanley
          Dean Witter Trust FSB, we will employ reasonable procedures to
          confirm that exchange instructions communicated over the telephone
          are genuine. These procedures may include


12


<PAGE>






          requiring various forms of personal identification such as name,
          mailing address, social security or other tax identification number.
          Telephone instructions also may be recorded.


          Telephone instructions will be accepted if received by the Fund's
          transfer agent between 9:00 a.m. and 4:00 p.m. Eastern time on any
          day the New York Stock Exchange is open for business. During periods
          of drastic economic or market changes, it is possible that the
          telephone exchange procedures may be difficult to implement, although
          this has not been the case with the Morgan Stanley Dean Witter Funds
          in the past.


          Margin Accounts. If you have pledged your Fund shares in a margin
          account, contact your Morgan Stanely Dean Witter Financial Advisor or
          other authorized financial representative regarding restrictions on
          the exchange of such shares.


          Tax Considerations of Exchanges. If you exchange shares of the Fund
          for shares of another Morgan Stanley Dean Witter Fund, there are
          important tax considerations. For tax purposes, the exchange out of
          the Fund is considered a sale of the Fund's shares -- and the
          exchange into the other fund is considered a purchase. As a result,
          you may realize a capital gain or loss.


          You should review the "Tax Consequences" section and consult your own
          tax professional about the tax consequences of an exchange.


          Limitations on Exchanges. Certain patterns of exchanges and/or
          purchase or sale transactions involving the Fund or other Morgan
          Stanley Dean Witter Funds may result in the Fund limiting or
          prohibiting, at its discretion, additional purchases and/or
          exchanges. Determinations in this regard may be made based on the
          frequency or dollar amount of previous exchanges. The Fund will
          notify you in advance of limiting your exchange privileges.


          CDSC Calculations on Exchanges. See the "Share Class Arrangements"
          section of this Prospectus for a discussion of how applicable
          contingent deferred sales charges (CDSCs) are calculated for shares
          of one Morgan Stanley Dean Witter Fund that are exchanged for shares
          of another.


          For further information regarding exchange privileges, you should
          contact your Morgan Stanley Dean Witter Financial Advisor or call
          (800) 869-NEWS.


                                                                              13


<PAGE>







[GRAPHIC OMITTED]


          HOW TO SELL SHARES
-----------------------------------------
          You can sell some or all of your Fund shares at any time. If you sell
          Class A, Class B or Class C shares, your net sale proceeds are
          reduced by the amount of any applicable CDSC. Your shares will be
          sold at the next price calculated after we receive your order to sell
          as described below.

<TABLE>
<CAPTION>
OPTIONS               PROCEDURES
----------------------------------------------------------------------------------------------------------------------
<S>                   <C>
  Contact Your        To sell your shares, simply call your Morgan Stanley Dean Witter Financial Advisor or other
  Financial Advisor   authorized financial representative.
                      ------------------------------------------------------------------------------------------------
[GRAPHIC OMITTED]     Payment will be sent to the address to which the account is registered or deposited in your
                      brokerage account.
----------------------------------------------------------------------------------------------------------------------
  By Letter           You can also sell your shares by writing a "letter of instruction" that includes:
                      o  your account number;
[GRAPHIC OMITTED]     o  the dollar amount or the number of shares you wish to sell;
                      o  the Class of shares you wish to sell; and
                      o  the signature of each owner as it appears on the account.
                      ------------------------------------------------------------------------------------------------
                      If you are requesting payment to anyone other than the registered owner(s) or that payment
                      be sent to any address other than the address of the registered owner(s) or pre-designated
                      bank account, you will need a signature guarantee. You can obtain a signature guarantee from
                      an eligible guarantor acceptable to Morgan Stanley Dean Witter Trust FSB. (You should
                      contact Morgan Stanley Dean Witter Trust FSB at (800) 869-NEWS for a determination as to
                      whether a particular institution is an eligible guarantor.) A notary public cannot provide a
                      signature guarantee. Additional documentation may be required for shares held by a
                      corporation, partnership, trustee or executor.
                      ------------------------------------------------------------------------------------------------
                      Mail the letter to Morgan Stanley Dean Witter Trust FSB at P.O. Box 983, Jersey City, NJ
                      07303. If you hold share certificates, you must return the certificates, along with the letter
                      and any required additional documentation.
                      ------------------------------------------------------------------------------------------------
                      A check will be mailed to the name(s) and address in which the account is registered, or
                      otherwise according to your instructions.
----------------------------------------------------------------------------------------------------------------------
  Systematic          If your investment in all of the Morgan Stanley Dean Witter Family of Funds has a total
  Withdrawal Plan     market value of at least $10,000, you may elect to withdraw amounts of $25 or more, or in
                      any whole percentage of a fund's balance (provided the amount is at least $25), on a monthly,
 [GRAPHIC OMITTED]    quarterly, semi-annual or annual basis, from any fund with a balance of at least $1,000. Each
                      time you add a fund to the plan, you must meet the plan requirements.
                      ------------------------------------------------------------------------------------------------
                      Amounts withdrawn are subject to any applicable CDSC. A CDSC may be waived under
                      certain circumstances. See the Class B waiver categories listed in the "Share Class
                      Arrangements" section of this Prospectus.
                      ------------------------------------------------------------------------------------------------
                      To sign up for the Systematic Withdrawal Plan, contact your Morgan Stanley Dean Witter
                      Financial Advisor or call (800) 869-NEWS. You may terminate or suspend your plan at any
                      time. Please remember that withdrawals from the plan are sales of shares, not Fund
                      "distributions," and ultimately may exhaust your account balance. The Fund may terminate or
                      revise the plan at any time.
----------------------------------------------------------------------------------------------------------------------
</TABLE>

          Payment for Sold Shares. After we receive your complete instructions
          to sell as described above, a check will be mailed to you within
          seven days, although we will attempt to make payment within one
          business day. Payment may also be sent to your brokerage account.


14


<PAGE>






          Payment may be postponed or the right to sell your shares suspended
          under unusual circumstances. If you request to sell shares that were
          recently purchased by check, your sale will not be effected until it
          has been verified that the check has been honored.


          Tax Considerations. Normally, your sale of Fund shares is subject to
          federal and state income tax. You should review the "Tax
          Consequences" section of this Prospectus and consult your own tax
          professional about the tax consequences of a sale.


          Reinstatement Privilege. If you sell Fund shares and have not
          previously exercised the reinstatement privilege, you may, within 35
          days after the date of sale, invest any portion of the proceeds in
          the same Class of Fund shares at their net asset value and receive a
          pro rata credit for any CDSC paid in connection with the sale.


          Involuntary Sales. The Fund reserves the right, on sixty days' notice,
          to sell the shares of any shareholder (other than shares held in an
          IRA or 403(b) Custodial Account) whose shares, due to sales by the
          shareholder, have a value below $100, or in the case of an account
          opened through EasyInvest (Service Mark), if after 12 months the
          shareholder has invested less than $1,000 in the account.


          However, before the Fund sells your shares in this manner, we will
          notify you and allow you sixty days to make an additional investment
          in an amount that will increase the value of your account to at least
          the required amount before the sale is processed. No CDSC will be
          imposed on any involuntary sale.


          Margin Accounts. If you have pledged your Fund shares in a margin
          account, contact your Morgan Stanley Dean Witter Financial Advisor or
          other authorized financial representative regarding restrictions on
          the sale of such shares.


                                                                              15


<PAGE>



[GRAPHIC OMITTED]


          DISTRIBUTIONS
------------------------------------
          The Fund passes substantially all of its earnings from income and
          capital gains along to its investors as "distributions." The Fund
          earns income from stocks and interest from fixed-income investments.
          These amounts are passed along to Fund shareholders as "income
          dividend distributions." The Fund realizes capital gains whenever it
          sells securities for a higher price than it paid for them. These
          amounts may be passed along as "capital gain distributions."


[sidebar]
TARGETED DIVIDENDS (Service Mark)
You may select to have your Fund distributions automatically invested in other
Classes of Fund shares or Classes of another Morgan Stanley Dean Witter Fund
that you own. Contact your Morgan Stanley Dean Witter Financial Advisor for
further information about this service.
[end sidebar]


          The Fund declares income dividends separately for each Class.
          Distributions paid on Class A and Class D shares usually will be
          higher than for Class B and Class C because distribution fees that
          Class B and Class C pay are higher. Normally, income dividends are
          distributed to shareholders annually. Capital gains, if any, are
          usually distributed in December. The Fund, however, may retain and
          reinvest any long-term capital gains. The Fund may at times make
          payments from sources other than income or capital gains that
          represent a return of a portion of your investment.


          Distributions are reinvested automatically in additional shares of
          the same Class and automatically credited to your account, unless you
          request in writing that all distributions be paid in cash. If you
          elect the cash option, the Fund will mail a check to you no later
          than seven business days after the distribution is declared. However,
          if you purchase Fund shares through a Financial Advisor within three
          business days prior to the record date for the distribution, the
          distribution will automatically be paid to you in cash, even if you
          did not request to receive all distributions in cash. No interest
          will accrue on uncashed checks. If you wish to change how your
          distributions are paid, your request should be received by the Fund's
          transfer agent, Morgan Stanley Dean Witter Trust FSB, at least five
          business days prior to the record date of the distributions.



[GRAPHIC OMITTED]


       TAX CONSEQUENCES
------------------------------------
          As with any investment, you should consider how your Fund investment
          will be taxed. The tax information in this Prospectus is provided as
          general information. You should consult your own tax professional
          about the tax consequences of an investment in the Fund.


          Unless your investment in the Fund is through a tax-deferred
          retirement account, such as a 401(k) plan or IRA, you need to be
          aware of the possible tax consequences when:

           o  The Fund makes distributions; and

           o  You sell Fund shares, including an exchange to another Morgan
              Stanley Dean Witter Fund.


16


<PAGE>






          Taxes on Distributions. Your distributions are normally subject to
          federal and state income tax when they are paid, whether you take
          them in cash or reinvest them in Fund shares. A distribution also may
          be subject to local income tax. Any income dividend distributions and
          any short-term capital gain distributions are taxable to you as
          ordinary income. Any long-term capital gain distributions are taxable
          as long-term capital gains, no matter how long you have owned shares
          in the Fund.


          Every January, you will be sent a statement (IRS Form 1099-DIV)
          showing the taxable distributions paid to you in the previous year.
          The statement provides information on your dividends and capital
          gains for tax purposes.


          Taxes on Sales. Your sale of Fund shares normally is subject to
          federal and state income tax and may result in a taxable gain or loss
          to you. A sale also may be subject to local income tax. Your exchange
          of Fund shares for shares of another Morgan Stanley Dean Witter Fund
          is treated for tax purposes like a sale of your original shares and a
          purchase of your new shares. Thus, the exchange may, like a sale,
          result in a taxable gain or loss to you and will give you a new tax
          basis for your new shares.


          When you open your Fund account, you should provide your social
          security or tax identification number on your investment application.
          By providing this information, you will avoid being subject to a
          federal backup withholding tax of 31% on taxable distributions and
          redemption proceeds. Any withheld amount would be sent to the IRS as
          an advance tax payment.




[GRAPHIC OMITTED]


          SHARE CLASS ARRANGEMENTS
------------------------------------
          The Fund offers several Classes of shares having different
          distribution arrangements designed to provide you with different
          purchase options according to your investment needs. Your Morgan
          Stanley Dean Witter Financial Advisor or other authorized financial
          representative can help you decide which Class may be appropriate for
          you.


          The general public is offered three Classes: Class A shares, Class B
          shares and Class C shares, which differ principally in terms of sales
          charges and ongoing expenses. A fourth Class, Class D shares, is
          offered only to a limited category of investors. Shares that you
          acquire through reinvested distributions will not be subject to any
          front-end sales charge or CDSC -- contingent deferred sales charge.
          Sales personnel may receive different compensation for selling each
          Class of shares. The sales charges applicable to each Class provide
          for the distribution financing of shares of that Class.


                                                                              17


<PAGE>






          The chart below compares the sales charge and annual 12b-1 fees
          applicable to each Class:

<TABLE>
<CAPTION>
                                                                                                 MAXIMUM
CLASS     SALES CHARGE                                                                       ANNUAL 12B-1 FEE
---------------------------------------------------------------------------------------------------------------
<S>       <C>                                                                               <C>
  A       Maximum 5.25% initial sales charge reduced for purchase of $25,000 or more;
          shares sold without an initial sales charge are generally subject to a 1.0% CDSC
          during first year.                                                                       0.25%
---------------------------------------------------------------------------------------------------------------
  B       Maximum 5.0% CDSC during the first year decreasing to 0% after six years.                 1.0%
---------------------------------------------------------------------------------------------------------------
  C       1.0% CDSC during first year                                                               1.0%
---------------------------------------------------------------------------------------------------------------
  D       None                                                                                      None
---------------------------------------------------------------------------------------------------------------
</TABLE>

          CLASS A SHARES Class A shares are sold at net asset value plus an
          initial sales charge of up to 5.25%. The initial sales charge is
          reduced for purchases of $25,000 or more according to the schedule
          below. Investments of $1 million or more are not subject to an initial
          sales charge, but are generally subject to a contingent deferred sales
          charge, or CDSC, of 1.0% on sales made within one year after the last
          day of the month of purchase. The CDSC will be assessed in the same
          manner and with the same CDSC waivers as with Class B shares. Class A
          shares are also subject to a distribution (12b-1) fee of up to 0.25%
          of the average daily net assets of the Class.

          The offering price of Class A shares includes a sales charge
          (expressed as a percentage of the offering price) on a single
          transaction as shown in the following table:

[sidebar]
FRONT-END SALES CHARGE OR FSC
An initial sales charge you pay when purchasing Class A shares that is based on
a percentage of the offering price. The percentage declines based upon the
dollar value of Class A shares you purchase. We offer three ways to reduce your
Class A sales charges -- the Combined Purchase Privilege, Right of Accumulation
and Letter of Intent.
[end sidebar]

<TABLE>
<CAPTION>
                                                   FRONT-END SALES CHARGE
                                     ---------------------------------------------------
                                       PERCENTAGE OF PUBLIC   APPROXIMATE PERCENTAGE OF
AMOUNT OF SINGLE TRANSACTION              OFFERING PRICE         NET AMOUNT INVESTED
----------------------------------------------------------------------------------------
<S>                                   <C>                    <C>
  Less than $25,000                             5.25%                  5.54%
----------------------------------------------------------------------------------------
  $25,000 but less than $50,000                 4.75%                  4.99%
----------------------------------------------------------------------------------------
  $50,000 but less than $100,000                4.00%                  4.17%
----------------------------------------------------------------------------------------
  $100,000 but less than $250,000               3.00%                  3.09%
----------------------------------------------------------------------------------------
  $250,000 but less than $1 million             2.00%                  2.04%
----------------------------------------------------------------------------------------
  $1 million and over                            0                      0
----------------------------------------------------------------------------------------
</TABLE>


18


<PAGE>






          The reduced sales charge schedule is applicable to purchases of Class
          A shares in a single transaction by:

          o  A single account (including an individual, trust or fiduciary
             account).

          o  Family member accounts (limited to husband, wife and children
             under the age of 21).

          o  Pension, profit sharing or other employee benefit plans of
             companies and their affiliates.

          o  Tax-exempt organizations.

          o  Groups organized for a purpose other than to buy mutual fund
             shares.


          Combined Purchase Privilege. You also will have the benefit of
          reduced sales charges by combining purchases of Class A shares of the
          Fund in a single transaction with purchases of Class A shares of
          other Multi-Class Funds and shares of FSC Funds.


          Right of Accumulation. You also may benefit from a reduction of sales
          charges, if the cumulative net asset value of Class A shares of the
          Fund purchased in a single transaction, together with shares of other
          Funds you currently own which were previously purchased at a price
          including a front-end sales charge (including shares acquired through
          reinvestment of distributions), amounts to $25,000 or more. Also, if
          you have a cumulative net asset value of all your Class A and Class D
          shares equal to at least $5 million (or $25 million for certain
          employee benefit plans), you are eligible to purchase Class D shares
          of any Fund subject to the Fund's minimum initial investment
          requirement.


          You must notify your Morgan Stanley Dean Witter Financial Advisor or
          other authorized financial representative (or Morgan Stanley Dean
          Witter Trust FSB if you purchase directly through the Fund) at the
          time a purchase order is placed, that the purchase qualifies for the
          reduced sales charge under the Right of Accumulation. Similar
          notification must be made in writing when an order is placed by mail.
          The reduced sales charge will not be granted if: (i) notification is
          not furnished at the time of the order; or (ii) a review of the
          records of Dean Witter Reynolds or other authorized dealer of Fund
          shares or the Fund's transfer agent does not confirm your represented
          holdings.


          Letter of Intent. The schedule of reduced sales charges for larger
          purchases also will be available to you if you enter into a written
          "letter of intent." A letter of intent provides for the purchase of
          Class A shares of the Fund or other Multi-Class Funds or shares of
          FSC Funds within a thirteen-month period. The initial purchase under
          a letter of intent must be at least 5% of the stated investment goal.
          To determine the applicable sales charge reduction, you may also
          include: (1) the cost of shares of other Morgan Stanley Dean Witter
          Funds which were previously purchased at a price including a
          front-end sales charge during the 90-day period prior to the
          distributor receiving the letter of intent, and (2) the cost of
          shares of other funds you currently own acquired in exchange


                                                                              19


<PAGE>






          for shares of funds purchased during that period at a price including
          a front-end sales charge. You can obtain a letter of intent by
          contacting your Morgan Stanley Dean Witter Financial Advisor or other
          authorized financial representative, or by calling (800) 869-NEWS. If
          you do not achieve the stated investment goal within the
          thirteen-month period, you are required to pay the difference between
          the sales charges otherwise applicable and sales charges actually
          paid, which may be deducted from your investment.


          Other Sales Charge Waivers. In addition to investments of $1 million
          or more, your purchase of Class A shares is not subject to a
          front-end sales charge (or a CDSC upon sale) if your account
          qualifies under one of the following categories:

          o  A trust for which Morgan Stanley Dean Witter Trust FSB provides
             discretionary trustee services.

          o  Persons participating in a fee-based investment program (subject
             to all of its terms and conditions, including termination fees,
             mandatory sale or transfer restrictions on termination) approved by
             the Fund's distributor pursuant to which they pay an asset based
             fee for investment advisory, administrative and/or brokerage
             services.

          o  Employer-sponsored employee benefit plans, whether or not
             qualified under the Internal Revenue Code, for which Morgan Stanley
             Dean Witter Trust FSB serves as trustee or Dean Witter Reynolds'
             Retirement Plan Services serves as recordkeeper under a written
             Recordkeeping Services Agreement ("MSDW Eligible Plans") which have
             at least 200 eligible employees.

          o  A MSDW Eligible Plan whose Class B shares have converted to Class
             A shares, regardless of the plan's asset size or number of eligible
             employees.

          o  A client of a Morgan Stanley Dean Witter Financial Advisor who
             joined us from another investment firm within six months prior to
             the date of purchase of Fund shares, and you used the proceeds from
             the sale of shares of a proprietary mutual fund of that Financial
             Advisor's previous firm that imposed either a front-end or deferred
             sales charge to purchase Class A shares, provided that: (1) you
             sold the shares not more than 60 days prior to the purchase of Fund
             shares, and (2) the sale proceeds were maintained in the interim in
             cash or a money market fund.

          o  Current or retired Directors/Trustees of the Morgan Stanley Dean
             Witter Funds, such persons' spouses and children under the age of
             21, and trust accounts for which any of such persons is a
             beneficiary.

          o  Current or retired directors, officers and employees of Morgan
             Stanley Dean Witter & Co. and any of its subsidiaries, such
             persons' spouses and children under the age of 21, and trust
             accounts for which any of such persons is a beneficiary.


20


<PAGE>






          CLASS B SHARES Class B shares are offered at net asset value with no
          initial sales charge but are subject to a contingent deferred sales
          charge, or CDSC, as set forth in the table below. For the purpose of
          calculating the CDSC, shares are deemed to have been purchased on the
          last day of the month during which they were purchased.

[sidebar]
CONTINGENT DEFERRED SALES CHARGE OR CDSC
A fee you pay when you sell shares of certain Morgan Stanley Dean Witter Funds
purchased without an initial sales charge. This fee declines the longer you hold
your shares as set forth in the table.
[end sidebar]

<TABLE>
<CAPTION>

                                      CDSC AS A PERCENTAGE
YEAR SINCE PURCHASE PAYMENT MADE       OF AMOUNT REDEEMED
--------------------------------------------------------------------
<S>                                  <C>
  First                                        5.0%
  Second                                       4.0%
  Third                                        3.0%
  Fourth                                       2.0%
  Fifth                                        2.0%
  Sixth                                        1.0%
  Seventh and thereafter                       None
</TABLE>

          Each time you place an order to sell or exchange shares, shares with
          no CDSC will be sold or exchanged first, then shares with the lowest
          CDSC will be sold or exchanged next. For any shares subject to a
          CDSC, the CDSC will be assessed on an amount equal to the lesser of
          the current market value or the cost of the shares being sold.


          CDSC Waivers. A CDSC, if otherwise applicable, will be waived in the
          case of:

          o Sales of shares held at the time you die or become disabled
            (within the definition in Section 72(m)(7) of the Internal Revenue
            Code which relates to the ability to engage in gainful employment),
            if the shares are: (i) registered either in your name (not a trust)
            or in the names of you and your spouse as joint tenants with right
            of survivorship; or (ii) held in a qualified corporate or
            self-employed retirement plan, IRA or 403(b) Custodial Account,
            provided in either case that the sale is requested within one year
            of your death or initial determination of disability.

          o Sales in connection with the following retirement plan
            "distributions:" (i) lump-sum or other distributions from a
            qualified corporate or self-employed retirement plan following
            retirement (or, in the case of a "key employee" of a "top heavy"
            plan, following attainment of age 59 1/2); (ii) distributions from
            an IRA or 403(b) Custodial Account following attainment of age
            59 1/2; or (iii) a tax-free return of an excess IRA contribution (a
            "distribution" does not include a direct transfer of IRA, 403(b)
            Custodial Account or retirement plan assets to a successor
            custodian or trustee).

          o Sales of shares held for you as a participant in a MSDW Eligible
            Plan.

          o Sales of shares in connection with the Systematic Withdrawal Plan
            of up to 12% annually of the value of each fund from which plan
            sales are made. The percentage is


                                                                              21


<PAGE>






            determined on the date you establish the Systematic Withdrawal Plan
            and based on the next calculated share price. You may have this
            CDSC waiver applied in amounts up to 1% per month, 3% per quarter,
            6% semi-annually or 12% annually. Shares with no CDSC will be sold
            first, followed by those with the lowest CDSC. As such, the waiver
            benefit will be reduced by the amount of your shares that are not
            subject to a CDSC. If you suspend your participation in the plan,
            you may later resume plan payments without requiring a new
            determination of the account value for the 12% CDSC waiver.

          o Sales of shares if you simultaneously invest the proceeds in the
            Investment Manager's mutual fund asset allocation program, pursuant
            to which investors pay an asset-based fee. Any shares acquired in
            connection with the Investment Manager's mutual fund asset
            allocation program are subject to all of the terms and conditions
            of that program, including termination fees, mandatory sale or
            transfer restrictions on termination.


          All waivers will be granted only following the Fund's distributor
          receiving confirmation of your entitlement. If you believe you are
          eligible for a CDSC waiver, please contact your Financial Advisor or
          call (800) 869-NEWS.


          Distribution Fee. Class B shares are subject to an annual 12b-1 fee
          of 1.0% of the average daily net assets of Class B.


          Conversion Feature. After ten (10) years, Class B shares will convert
          automatically to Class A shares of the Fund with no initial sales
          charge. The ten year period runs from the last day of the month in
          which the shares were purchased, or in the case of Class B shares
          acquired through an exchange, from the last day of the month in which
          the original Class B shares were purchased; the shares will convert
          to Class A shares based on their relative net asset values in the
          month following the ten year period. At the same time, an equal
          proportion of Class B shares acquired through automatically
          reinvested distributions will convert to Class A shares on the same
          basis. (Class B shares acquired in exchange for shares of another
          Morgan Stanley Dean Witter Fund originally purchased before May 1,
          1997, however, will convert to Class A shares in
          May 2007).


          In the case of Class B shares held in a MSDW Eligible Plan, the plan
          is treated as a single investor and all Class B shares will convert
          to Class A shares on the conversion date of the Class B shares of a
          Morgan Stanley Dean Witter Fund purchased by that plan.


          Currently, the Class B share conversion is not a taxable event; the
          conversion feature may be cancelled if it is deemed a taxable event
          in the future by the Internal Revenue Service.


          If you exchange your Class B shares for shares of a Money Market
          Fund, a No-Load Fund, North American Government Income Trust or
          Short-Term U.S. Treasury Trust,


22


<PAGE>






          the holding period for conversion is frozen as of the last day of the
          month of the exchange and resumes on the last day of the month you
          exchange back into Class B shares.


          Exchanging Shares Subject to a CDSC. There are special considerations
          when you exchange Fund shares that are subject to a CDSC. When
          determining the length of time you held the shares and the
          corresponding CDSC rate, any period (starting at the end of the
          month) during which you held shares of a fund that does not charge a
          CDSC will not be counted. Thus, in effect the "holding period" for
          purposes of calculating the CDSC is frozen upon exchanging into a
          fund that does not charge a CDSC.


          For example, if you held Class B shares of the Fund for one year,
          exchanged to Class B of another Morgan Stanley Dean Witter
          Multi-Class Fund for another year, then sold your shares, a CDSC rate
          of 4% would be imposed on the shares based on a two year holding
          period -- one year for each fund. However, if you had exchanged the
          shares of the Fund for a Money Market Fund (which does not charge a
          CDSC) instead of the Multi-Class Fund, then sold your shares, a CDSC
          rate of 5% would be imposed on the shares based on a one year holding
          period. The one year in the Money Market Fund would not be counted.
          Nevertheless, if shares subject to a CDSC are exchanged for a fund
          that does not charge a CDSC, you will receive a credit when you sell
          the shares equal to the distribution (12b-1) fees you paid on those
          shares while in that fund up to the amount of any applicable CDSC.


          In addition, shares that are exchanged into or from a Morgan Stanley
          Dean Witter Fund subject to a higher CDSC rate will be subject to the
          higher rate, even if the shares are re-exchanged into a fund with a
          lower CDSC rate.


          CLASS C SHARES Class C shares are sold at net asset value with no
          initial sales charge but are subject to a CDSC of 1.0% on sales made
          within one year after the last day of the month of purchase. The CDSC
          will be assessed in the same manner and with the same CDSC waivers as
          with Class B shares.


          Distribution Fee. Class C shares are subject to an annual
          distribution (12b-1) fee of up to 1.0% of the average daily net
          assets of that Class. The Class C shares' distribution fee may cause
          that Class to have higher expenses and pay lower dividends than Class
          A or Class D shares. Unlike Class B shares, Class C shares have no
          conversion feature and, accordingly, an investor that purchases Class
          C shares may be subject to distribution (12b-1) fees applicable to
          Class C shares for an indefinite period.


          CLASS D SHARES Class D shares are offered without any sales charge on
          purchases or sales and without any distribution (12b-1) fee. Class D
          shares are offered only to investors meeting an initial investment
          minimum of $5 million ($25 million for MSDW Eligible Plans) and the
          following categories of investors:


                                                                              23


<PAGE>






          o Investors participating in the Investment Manager's mutual fund
            asset allocation program (subject to all of its terms and
            conditions, including termination fees, mandatory sale or transfer
            restrictions on termination) pursuant to which they pay an
            asset-based fee.

          o Persons participating in a fee-based investment program (subject
            to all of its terms and conditions, including termination fees,
            mandatory sale or transfer restrictions on termination) approved by
            the Fund's distributor pursuant to which they pay an asset based
            fee for investment advisory, administrative and/or brokerage
            services.

          o Employee benefit plans maintained by Morgan Stanley Dean Witter &
            Co. or any of its subsidiaries for the benefit of certain employees
            of Morgan Stanley Dean Witter & Co. and its subsidiaries.

          o Certain unit investment trusts sponsored by Dean Witter Reynolds.


          o Certain other open-end investment companies whose shares are
            distributed by the Fund's distributor.

          o Investors who were shareholders of the Dean Witter Retirement
            Series on September 11, 1998 for additional purchases for their
            former Dean Witter Retirement Series accounts.


          Meeting Class D Eligibility Minimums. To meet the $5 million ($25
          million for MSDW Eligible Plans) initial investment to qualify to
          purchase Class D shares you may combine: (1) purchases in a single
          transaction of Class D shares of the Fund and other Morgan Stanley
          Dean Witter Multi-Class Funds; and/or (2) previous purchases of Class
          A and Class D shares of Multi-Class Funds and shares of FSC Funds you
          currently own, along with shares of Morgan Stanley Dean Witter Funds
          you currently own that you acquired in exchange for those shares.


          NO SALES CHARGES FOR REINVESTED CASH DISTRIBUTIONS If you receive a
          cash payment representing an income dividend or capital gain and you
          reinvest that amount in the applicable Class of shares by returning
          the check within 30 days of the payment date, the purchased shares
          would not be subject to an initial sales charge or CDSC.

          PLAN OF DISTRIBUTION (RULE 12B-1 FEES) The Fund has adopted a Plan of
          Distribution in accordance with Rule 12b-1 under the Investment
          Company Act of 1940 with respect to the distribution of Class A, Class
          B and Class C shares. The Plan allows the Fund to pay distribution
          fees for the sale and distribution of these shares. It also allows the
          Fund to pay for services to shareholders of Class A, Class B and Class
          C shares. Because these fees are paid out of the Fund's assets on an
          ongoing basis, over time these fees will increase the cost of your
          investment in these Classes and may cost you more than paying other
          types of sales charges.


24


<PAGE>






MORGAN STANLEY DEAN WITTER
FAMILY OF FUNDS
                          The Morgan Stanley Dean Witter Family of Funds offers
                          investors a wide range of investment choices. Come on
                          in and meet the family!

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------
<S>                      <C>                                      <C>
 GROWTH FUNDS              GROWTH FUNDS                             THEME FUNDS
                           Aggressive Equity Fund                   Financial Services Trust
                           American Opportunities Fund              Health Sciences Trust
                           Capital Growth Securities                Information Fund
                           Developing Growth Securities             Natural Resource Development Securities
                           Growth Fund                              Technology Fund
                           Market Leader Trust
                           Mid-Cap Equity Trust                     GLOBAL/INTERNATIONAL FUNDS
                           New Discoveries Fund                     Competitive Edge Fund - "Best Ideas"
                           Next Generation Trust                     Portfolio
                           Small Cap Growth Fund                    European Growth Fund
                           Special Value Fund                       Fund of Funds - International Portfolio
                           Tax-Managed Growth Fund                  International Fund
                           21st Century Trend Fund                  International SmallCap Fund
                                                                    Japan Fund
                                                                    Latin American Growth Fund
                                                                    Pacific Growth Fund

----------------------------------------------------------------------------------------------------------------------
 GROWTH & INCOME FUNDS     Balanced Growth Fund                     Total Market Index Fund
                           Balanced Income Fund                     Total Return Trust
                           Convertible Securities Trust             Value Fund
                           Dividend Growth Securities               Value-Added Market Series/Equity Portfolio
                           Equity Fund
                           Fund of Funds - Domestic Portfolio       THEME FUNDS
                           Income Builder Fund                      Real Estate Fund
                           Mid-Cap Dividend Growth Securities       Utilities Fund
                           S&P 500 Index Fund
                           S&P 500 Select Fund                      GLOBAL FUNDS
                           Strategist Fund                          Global Dividend Growth Securities
                                                                    Global Utilities Fund

----------------------------------------------------------------------------------------------------------------------
 INCOME FUNDS              GOVERNMENT INCOME FUNDS                  GLOBAL INCOME FUNDS
                           Federal Securities Trust                 North American Government Income Trust
                           Short-Term U.S. Treasury Trust           World Wide Income Trust
                           U.S. Government Securities Trust
                                                                    TAX-FREE INCOME FUNDS
                           DIVERSIFIED INCOME FUNDS                 California Tax-Free Income Fund
                           Diversified Income Trust                 Hawaii Municipal Trust(FSC)
                                                                    Limited Term Municipal Trust(NL)
                           CORPORATE INCOME FUNDS                   Multi-State Municipal Series Trust(FSC)
                           High Yield Securities                    New York Tax-Free Income Fund
                           Intermediate Income Securities           Tax-Exempt Securities Trust
                           Short-Term Bond Fund(NL)

----------------------------------------------------------------------------------------------------------------------
 MONEY MARKET FUNDS        TAXABLE MONEY MARKET FUNDS               TAX-FREE MONEY MARKET FUNDS
                           Liquid Asset Fund(MM)                    California Tax-Free Daily Income Trust(MM)
                           U.S. Government Money Market Trust(MM)   New York Municipal Money Market Trust(MM)
                                                                    Tax-Free Daily Income Trust(MM)
</TABLE>

There may be funds created after this Prospectus was published. Please consult
the inside back cover of a new fund's prospectus for its designation, e.g.,
Multi-Class Fund or Money Market Fund.

Unless otherwise noted, each listed Morgan Stanley Dean Witter Fund, except for
North American Government Income Trust and Short-Term U.S. Treasury Trust, is a
Multi-Class Fund. A Multi-Class Fund is a mutual fund offering multiple Classes
of shares. The other types of funds are: NL -- No-Load (Mutual) Fund; MM --
Money Market Fund; FSC -- A mutual fund sold with a front-end sales charge and
a distribution (12b-1) fee.



<PAGE>




                                             PROSPECTUS o AUGUST 17, 2000

The Fund's Statement of Additional Information also provides additional
information about the Fund. The Statement of Additional Information is
incorporated herein by reference (legally is part of this Prospectus). For a
free copy of this document, to request other information about the Fund, or to
make shareholder inquiries, please call:


                                (800) 869-NEWS


You also may obtain information about the Fund by calling your Morgan Stanley
Dean Witter Financial Advisor or by visiting our Internet site at:

                            WWW.MSDWADVICE.COM/FUNDS


Information about the Fund (including the Statement of Additional Information)
can be viewed and copied at the Securities and Exchange Commission's Public
Reference Room in Washington, DC. Information about the Reference Room's
operations may be obtained by calling the SEC at (202) 942-8090. Reports and
other information about the Fund are available on the EDGAR Database on the
SEC's Internet site (www.sec.gov), and copies of this information may be
obtained, after paying a duplicating fee, by electronic request at the
following e-mail address: [email protected], or by writing the Public
Reference Section of the SEC, Washington, DC 20549-0102.











(THE FUND'S INVESTMENT COMPANY ACT FILE NO. IS 811-9983)

Morgan Stanley Dean Witter



                                                                 TECHNOLOGY FUND

                                                              A MUTUAL FUND THAT
                                                                 SEEKS LONG-TERM
                                                            CAPITAL APPRECIATION







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