PUTNAM HEALTH SCIENCES TRUST
NSAR-B, 1997-10-29
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SIGNATURE   PAUL BUCAVALAS                               
TITLE       VICE PRESIDENT      
 

WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Putnam Health Sciences Trust
</LEGEND>
<SERIES>
   <NUMBER> 3
   <NAME> CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          AUG-31-1997
<PERIOD-END>                               AUG-31-1997
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<INVESTMENTS-AT-VALUE>                  $2,271,291,667
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Putnam Health Sciences Trust
</LEGEND>
<SERIES>
   <NUMBER> 3
   <NAME> CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          AUG-31-1997
<PERIOD-END>                               AUG-31-1997
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<INVESTMENTS-AT-VALUE>                  $2,271,291,667
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
Putnam Health Sciences Trust
</LEGEND>
<SERIES>
   <NUMBER> 3
   <NAME> CLASS M
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
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</TABLE>


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