CALVERT SOCIAL INVESTMENT FUND
NSAR-A, 1997-05-29
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<PAGE>      PAGE  1
000 A000000 03/31/97
000 C000000 0000356682
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 CALVERT SOCIAL INVESTMENT FUND
001 B000000 811-3334
001 C000000 3019514881
002 A000000 4550 MONTGOMERY AVE., SUITE 1000N
002 B000000 BETHESDA
002 C000000 MD
002 D010000 20814
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  4
007 C010100  1
007 C020100 MONEY MARKET PORTFOLIO
007 C030100 N
007 C010200  2
007 C020200 MANAGED GROWTH PORTFOLIO
007 C030200 N
007 C010300  3
007 C020300 BOND PORTFOLIO
007 C030300 N
007 C010400  4
007 C020400 EQUITY PORTFOLIO
007 C030400 N
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
020 A000001 JOHNSTON, LEMON & CO
020 C000001     49
020 A000002 DEAN WITTER REYNOLDS INC.
020 C000002     34
020 A000003 BEAR STEARNS SECURITIES CORP
020 C000003     33
020 A000004 CAPITAL INSTITUTIONAL SERVICES, INC.
020 C000004     30
020 A000005 LIPPER ANALYTICAL SECURITIES CORP
020 C000005     27
020 A000006 BLAIR (WILLIAM) AND CO
<PAGE>      PAGE  2
020 C000006     26
020 A000007 DONALDSON LUFKIN & JENRETTE SECURITIES CORP
020 C000007     22
020 A000008 INSTINET
020 C000008     20
020 A000009 SOUNDVIEW FINANCIAL GROUP, INC.
020 C000009     18
020 A000010 WEISS, PECK & GREER. L.L.C.
020 C000010     17
021  000000      570
022 A000001 STATE STREET BANK
022 C000001   1870100
022 D000001         0
022 A000002 DONALDSON LUFKIN
022 C000002   1600467
022 D000002     23406
022 A000003 UBS SECURITIES INC.
022 C000003    686806
022 D000003         0
022 A000004 MERRIL LYCNCH GOV SEC
022 C000004    110750
022 D000004     61288
022 A000005 GOLDMAN SACHS
022 C000005     64450
022 D000005     38166
022 A000006 PAINE WEBBER INC
022 C000006     67067
022 D000006     20941
022 A000007 DEAN WITTER REYNOLDS
022 C000007     38051
022 D000007     29579
022 A000008 SALOMON BROTHERS INC.
022 C000008     38866
022 D000008     25579
022 A000009 SMITH BARNEY INC
022 C000009     33135
022 D000009      3020
022 A000010 MORGAN STANLEY
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<PAGE>      PAGE  8
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<PAGE>      PAGE  10
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<PAGE>      PAGE  11
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SIGNATURE   WILLIAM M. TARTIKOFF                         
TITLE       GENERAL COUNSEL     
 


<TABLE> <S> <C>

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<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
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   <NUMBER> 111
   <NAME> MONEY MARKET PORTFOLIO
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
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   <NAME> MANAGED GROWTH PORTFOLIO, CLASS A
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
<SERIES>
   <NUMBER> 123
   <NAME> MANAGED GROWTH PORTFOLIO, CLASS C
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

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<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
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   <NUMBER> 131
   <NAME> BOND PORTFOLIO
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
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   <NAME> EQUITY PORTFOLIO, CLASS A
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<S>                             <C>
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000356682
<NAME> CALVERT SOCIAL INVESTMENT FUND
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   <NAME> EQUITY PORTFOLIO, CLASS C
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<S>                             <C>
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</TABLE>


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