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                       MFS(R) SCIENCE AND TECHNOLOGY FUND

                      Supplement to the Current Prospectus


The description of portfolio manager under the "Management of the Funds" section
is hereby restated as follows:

David E.  Sette-Ducati,  a Vice  President of MFS, has been employed by MFS as a
portfolio manager since 1995. Mr.  Sette-Ducati  became the portfolio manager of
the fund effective March 1, 2000.


                  The date of this Supplement is March 1, 2000.



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