<PAGE> PAGE 1
000 A000000 02/28/95
000 C000000 798244
000 D000000 Y
000 E000000 NF
000 F000000 Y
000 G000000 Y
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 MFS SERIES TRUST I
001 B000000 811-4777
001 C000000 6179545000
002 A000000 500 BOYLSTON STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02116
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 3
007 C010100 1
007 C020100 MFS MANAGED SECTORS FUND
007 C030100 N
007 C010200 2
007 C020200 MFS CASH RESERVE FUND
007 C030200 N
007 C010300 3
007 C020300 MFS WORLD ASSET ALLOCATION FUND
007 C030300 N
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 MASSACHUSETTS FINANCIAL SERVICES COMPANY
008 B00AA01 A
008 C00AA01 801-17352
008 D01AA01 BOSTON
008 D02AA01 MA
008 D03AA01 02116
011 A00AA01 MFS FINANCIAL SERVICES, INC.
011 B00AA01 8-27864
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02116
012 A00AA01 MFS SERVICE CENTER, INC.
012 B00AA01 84-1316
<PAGE> PAGE 2
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02107
012 C04AA01 9906
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 50
019 C00AA00 MASSFINSER
020 A000001 PAINEWEBBER INCORPORATED
020 B000001 13-2638166
020 C000001 105
020 A000002 MORGAN STANLEY
020 B000002 13-2655998
020 C000002 54
020 A000003 CS FIRST BOSTON CORP.
020 B000003 13-5659485
020 C000003 50
020 A000004 GOLDMAN SACHS & COMPANY
020 B000004 13-5108880
020 C000004 35
020 A000005 MERRILL LYNCH & CO.
020 B000005 13-5674085
020 C000005 30
020 A000006 PRIVATE LEDGER FINANCIAL SERVICES
020 B000006 95-2834236
020 C000006 26
020 A000007 SALOMON BROTHERS INC.
020 B000007 13-3082694
020 C000007 24
020 A000008 INSTINET CORP.
020 B000008 13-3443395
020 C000008 24
020 A000009 SANFORD BERNSTEIN & CO.
020 B000009 13-2625874
020 C000009 22
020 A000010 DUNLEVY & COMPANY
020 B000010 13-2919975
020 C000010 18
021 000000 695
022 A000001 LEHMAN BROTHERS
022 B000001 13-2518466
022 C000001 433077
022 D000001 39413
022 A000002 CHEMICAL BANK
022 B000002 13-4994650
022 C000002 308837
022 D000002 20695
022 A000003 PRUDENTIAL SECURITIES
022 B000003 22-2347336
022 C000003 221572
022 D000003 17389
<PAGE> PAGE 3
022 A000004 GOLDMAN SACHS & COMPANY
022 B000004 13-5108880
022 C000004 195613
022 D000004 12289
022 A000005 CS FIRST BOSTON
022 B000005 13-5659485
022 C000005 167851
022 D000005 5979
022 A000006 BANK OF AMERICA
022 B000006 94-1687665
022 C000006 130223
022 D000006 0
022 A000007 FIRST CHICAGO
022 B000007 36-0899825
022 C000007 100313
022 D000007 0
022 A000008 NATIONSBANK
022 B000008 75-0520130
022 C000008 77341
022 D000008 0
022 A000009 FORD MOTOR CREDIT
022 B000009 38-1612444
022 C000009 59969
022 D000009 0
022 A000010 J.P. MORGAN SECURITIES
022 B000010 13-3224016
022 C000010 26786
022 D000010 2005
023 C000000 1884809
023 D000000 147933
026 A000000 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 N
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 N
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
<PAGE> PAGE 4
054 L00AA00 N
054 M00AA00 Y
054 N00AA00 N
054 O00AA00 N
058 A00AA00 N
059 00AA00 Y
060 A00AA00 N
060 B00AA00 N
061 00AA00 1000
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 Y
077 Q020000 N
077 Q030000 N
078 000000 N
080 A00AA00 NATIONAL UNION INSURANCE CO.
080 B00AA00 ICI MUTUAL
080 C00AA00 60000
081 A00AA00 Y
081 B00AA00 74
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
086 A01AA00 0
086 A02AA00 0
086 B01AA00 0
086 B02AA00 0
086 C01AA00 0
086 C02AA00 0
086 D01AA00 0
086 D02AA00 0
086 E01AA00 0
<PAGE> PAGE 5
086 E02AA00 0
086 F01AA00 0
086 F02AA00 0
013 A000101 DELOITTE & TOUCHE
013 B010101 BOSTON
013 B020101 MA
013 B030101 02110
013 B040101 1617
015 A000101 STATE STREET BANK AND TRUST COMPANY
015 B000101 C
015 C010101 BOSTON
015 C020101 MA
015 C030101 02110
015 E010101 X
015 A000102 CHASE MANHATTAN BANK, N.A.
015 B000102 S
015 C010102 NEW YORK
015 C020102 NY
015 C030102 10081
015 E040102 X
024 000100 Y
025 A000101 CHARLES SCHWAB CORP.
025 B000101 94-1737782
025 C000101 E
025 D000101 4020
025 D000102 0
025 D000103 0
025 D000104 0
025 D000105 0
025 D000106 0
025 D000107 0
025 D000108 0
028 A010100 4489
028 A020100 0
028 A030100 0
028 A040100 8959
028 B010100 8204
028 B020100 1
028 B030100 0
028 B040100 10099
028 C010100 5655
028 C020100 0
028 C030100 0
028 C040100 9079
028 D010100 6202
028 D020100 21847
028 D030100 0
028 D040100 5478
028 E010100 4917
028 E020100 0
028 E030100 0
<PAGE> PAGE 6
028 E040100 11715
028 F010100 9689
028 F020100 0
028 F030100 0
028 F040100 9658
028 G010100 39155
028 G020100 21848
028 G030100 0
028 G040100 54988
028 H000100 1756
029 000100 Y
030 A000100 51
030 B000100 5.75
030 C000100 0.00
031 A000100 7
031 B000100 0
032 000100 44
033 000100 0
034 000100 Y
035 000100 84
036 A000100 N
036 B000100 0
037 000100 N
038 000100 0
039 000100 N
040 000100 Y
041 000100 Y
042 A000100 0
042 B000100 0
042 C000100 5
042 D000100 95
042 E000100 0
042 F000100 0
042 G000100 0
042 H000100 0
043 000100 1198
044 000100 0
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.750
048 A010100 0
048 A020100 0.000
048 B010100 0
048 B020100 0.000
048 C010100 0
048 C020100 0.000
048 D010100 0
048 D020100 0.000
048 E010100 0
048 E020100 0.000
<PAGE> PAGE 7
048 F010100 0
048 F020100 0.000
048 G010100 0
048 G020100 0.000
048 H010100 0
048 H020100 0.000
048 I010100 0
048 I020100 0.000
048 J010100 0
048 J020100 0.000
048 K010100 0
048 K020100 0.000
049 000100 N
050 000100 N
051 000100 N
052 000100 N
053 A000100 N
055 A000100 N
055 B000100 N
056 000100 N
057 000100 N
062 A000100 N
062 B000100 0.0
062 C000100 0.0
062 D000100 0.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
062 J000100 0.0
062 K000100 0.0
062 L000100 0.0
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
066 A000100 Y
066 B000100 N
066 C000100 Y
066 D000100 N
066 E000100 N
066 F000100 N
066 G000100 N
067 000100 N
068 A000100 N
068 B000100 N
069 000100 N
070 A010100 Y
<PAGE> PAGE 8
070 A020100 N
070 B010100 Y
070 B020100 N
070 C010100 N
070 C020100 N
070 D010100 Y
070 D020100 N
070 E010100 N
070 E020100 N
070 F010100 Y
070 F020100 N
070 G010100 Y
070 G020100 N
070 H010100 Y
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 Y
070 K010100 Y
070 K020100 N
070 L010100 Y
070 L020100 Y
070 M010100 Y
070 M020100 Y
070 N010100 Y
070 N020100 N
070 O010100 Y
070 O020100 N
070 P010100 Y
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 191822
071 B000100 221624
071 C000100 313589
071 D000100 61
072 A000100 6
072 B000100 110
072 C000100 1508
072 D000100 0
072 E000100 0
072 F000100 1173
072 G000100 0
072 H000100 0
072 I000100 305
072 J000100 85
072 K000100 25
072 L000100 6
<PAGE> PAGE 9
072 M000100 19
072 N000100 0
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 7
072 S000100 41
072 T000100 1198
072 U000100 0
072 V000100 0
072 W000100 162
072 X000100 3019
072 Y000100 0
072 Z000100 -1402
072AA000100 11753
072BB000100 0
072CC010100 0
072CC020100 5134
072DD010100 0
072DD020100 0
072EE000100 23919
073 A010100 0.0000
073 A020100 0.0000
073 B000100 1.0300
073 C000100 0.0000
074 A000100 50
074 B000100 0
074 C000100 4275
074 D000100 0
074 E000100 0
074 F000100 321229
074 G000100 0
074 H000100 0
074 I000100 0
074 J000100 7379
074 K000100 1024
074 L000100 212
074 M000100 5
074 N000100 334175
074 O000100 10386
074 P000100 746
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 177
074 S000100 0
074 T000100 322866
074 U010100 25694
074 U020100 16489
074 V010100 12.58
<PAGE> PAGE 10
074 V020100 12.56
074 W000100 0.0000
074 X000100 37486
074 Y000100 0
075 A000100 0
075 B000100 315523
076 000100 0.00
013 A000201 DELOITTE & TOUCHE
013 B010201 BOSTON
013 B020201 MA
013 B030201 02110
013 B040201 1617
015 A000201 STATE STREET BANK AND TRUST COMPANY
015 B000201 C
015 C010201 BOSTON
015 C020201 MA
015 C030201 02110
015 E010201 X
024 000200 N
028 A010200 75624
028 A020200 481
028 A030200 0
028 A040200 50753
028 B010200 71493
028 B020200 592
028 B030200 0
028 B040200 73859
028 C010200 78513
028 C020200 634
028 C030200 0
028 C040200 59869
028 D010200 70883
028 D020200 610
028 D030200 0
028 D040200 97166
028 E010200 62445
028 E020200 616
028 E030200 0
028 E040200 81987
028 F010200 45253
028 F020200 389
028 F030200 0
028 F040200 94099
028 G010200 404211
028 G020200 3322
028 G030200 0
028 G040200 457734
028 H000200 0
029 000200 N
030 A000200 0
030 B000200 0.00
<PAGE> PAGE 11
030 C000200 0.00
034 000200 Y
035 000200 366
036 A000200 N
036 B000200 0
037 000200 N
038 000200 0
040 000200 Y
041 000200 Y
042 A000200 0
042 B000200 0
042 C000200 100
042 D000200 0
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
043 000200 1137
044 000200 0
045 000200 Y
046 000200 N
047 000200 Y
048 000200 0.550
048 A010200 0
048 A020200 0.000
048 B010200 0
048 B020200 0.000
048 C010200 0
048 C020200 0.000
048 D010200 0
048 D020200 0.000
048 E010200 0
048 E020200 0.000
048 F010200 0
048 F020200 0.000
048 G010200 0
048 G020200 0.000
048 H010200 0
048 H020200 0.000
048 I010200 0
048 I020200 0.000
048 J010200 0
048 J020200 0.000
048 K010200 0
048 K020200 0.000
049 000200 N
050 000200 N
051 000200 N
052 000200 N
053 A000200 Y
053 C000200 Y
<PAGE> PAGE 12
055 A000200 N
055 B000200 N
056 000200 Y
057 000200 N
062 A000200 Y
062 B000200 0.0
062 C000200 76.7
062 D000200 0.0
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 26.2
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
062 O000200 0.0
062 P000200 0.0
062 Q000200 0.0
062 R000200 -2.9
063 A000200 23
063 B000200 0.0
064 A000200 N
066 A000200 N
067 000200 N
068 A000200 N
068 B000200 N
069 000200 N
070 A010200 Y
070 A020200 Y
070 B010200 N
070 B020200 N
070 C010200 N
070 C020200 N
070 D010200 N
070 D020200 N
070 E010200 N
070 E020200 N
070 F010200 N
070 F020200 N
070 G010200 N
070 G020200 N
070 H010200 N
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 N
070 J020200 N
070 K010200 Y
<PAGE> PAGE 13
070 K020200 N
070 L010200 Y
070 L020200 N
070 M010200 N
070 M020200 N
070 N010200 Y
070 N020200 N
070 O010200 Y
070 O020200 N
070 P010200 Y
070 P020200 N
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 0
071 B000200 0
071 C000200 0
071 D000200 0
072 A000200 6
072 B000200 6167
072 C000200 0
072 D000200 0
072 E000200 0
072 F000200 637
072 G000200 0
072 H000200 0
072 I000200 252
072 J000200 35
072 K000200 25
072 L000200 21
072 M000200 18
072 N000200 0
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 7
072 S000200 2
072 T000200 1137
072 U000200 0
072 V000200 0
072 W000200 155
072 X000200 2289
072 Y000200 119
072 Z000200 3996
072AA000200 0
072BB000200 0
072CC010200 0
072CC020200 0
072DD010200 3996
072DD020200 3928
<PAGE> PAGE 14
072EE000200 0
073 A010200 0.0200
073 A020200 0.0200
073 B000200 0.0000
073 C000200 0.0000
074 A000200 194
074 B000200 0
074 C000200 170448
074 D000200 0
074 E000200 0
074 F000200 0
074 G000200 0
074 H000200 0
074 I000200 0
074 J000200 0
074 K000200 560
074 L000200 0
074 M000200 2
074 N000200 171204
074 O000200 0
074 P000200 5481
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 133
074 S000200 0
074 T000200 165590
074 U010200 165590
074 U020200 161516
074 V010200 1.00
074 V020200 1.00
074 W000200 1.0000
074 X000200 17602
074 Y000200 0
075 A000200 232074
075 B000200 0
076 000200 0.00
013 A000301 ERNST & YOUNG
013 B010301 BOSTON
013 B020301 MA
013 B030301 02116
015 A000301 INVESTORS BANK AND TRUST COMPANY
015 B000301 C
015 C010301 BOSTON
015 C020301 MA
015 C030301 02110
015 E010301 X
024 000300 N
028 A010300 24409
028 A020300 218
<PAGE> PAGE 15
028 A030300 0
028 A040300 1185
028 B010300 16423
028 B020300 0
028 B030300 0
028 B040300 987
028 C010300 20271
028 C020300 0
028 C030300 0
028 C040300 1165
028 D010300 9859
028 D020300 902
028 D030300 0
028 D040300 1760
028 E010300 7918
028 E020300 0
028 E030300 0
028 E040300 2187
028 F010300 5868
028 F020300 0
028 F030300 0
028 F040300 3091
028 G010300 84749
028 G020300 1120
028 G030300 0
028 G040300 10375
028 H000300 0
029 000300 Y
030 A000300 0
030 B000300 4.75
030 C000300 0.00
031 A000300 0
031 B000300 0
032 000300 0
033 000300 0
034 000300 Y
035 000300 35
036 A000300 N
036 B000300 0
037 000300 N
038 000300 0
039 000300 N
040 000300 Y
041 000300 Y
042 A000300 0
042 B000300 0
042 C000300 0
042 D000300 100
042 E000300 0
042 F000300 0
042 G000300 0
<PAGE> PAGE 16
042 H000300 0
043 000300 365
044 000300 0
045 000300 Y
046 000300 N
047 000300 Y
048 000300 0.600
048 A010300 0
048 A020300 0.000
048 B010300 0
048 B020300 0.000
048 C010300 0
048 C020300 0.000
048 D010300 0
048 D020300 0.000
048 E010300 0
048 E020300 0.000
048 F010300 0
048 F020300 0.000
048 G010300 0
048 G020300 0.000
048 H010300 0
048 H020300 0.000
048 I010300 0
048 I020300 0.000
048 J010300 0
048 J020300 0.000
048 K010300 0
048 K020300 0.000
049 000300 N
050 000300 N
051 000300 N
052 000300 N
053 A000300 Y
053 B000300 N
053 C000300 Y
055 A000300 N
055 B000300 N
056 000300 Y
057 000300 N
062 A000300 N
062 B000300 0.0
062 C000300 0.0
062 D000300 0.0
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 0.0
062 J000300 0.0
062 K000300 0.0
<PAGE> PAGE 17
062 L000300 0.0
062 M000300 0.0
062 N000300 0.0
062 O000300 0.0
062 P000300 0.0
062 Q000300 0.0
062 R000300 0.0
063 A000300 0
063 B000300 0.0
066 A000300 Y
066 B000300 N
066 C000300 N
066 D000300 N
066 E000300 N
066 F000300 N
066 G000300 Y
067 000300 N
068 A000300 N
068 B000300 N
069 000300 N
070 A010300 Y
070 A020300 N
070 B010300 Y
070 B020300 N
070 C010300 Y
070 C020300 Y
070 D010300 Y
070 D020300 N
070 E010300 Y
070 E020300 N
070 F010300 Y
070 F020300 N
070 G010300 Y
070 G020300 N
070 H010300 Y
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 Y
070 K010300 Y
070 K020300 N
070 L010300 Y
070 L020300 Y
070 M010300 Y
070 M020300 Y
070 N010300 Y
070 N020300 N
070 O010300 Y
070 O020300 N
070 P010300 Y
<PAGE> PAGE 18
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 128638
071 B000300 43369
071 C000300 94576
071 D000300 46
072 A000300 6
072 B000300 1950
072 C000300 372
072 D000300 0
072 E000300 -22
072 F000300 302
072 G000300 0
072 H000300 0
072 I000300 94
072 J000300 31
072 K000300 27
072 L000300 34
072 M000300 13
072 N000300 65
072 O000300 0
072 P000300 0
072 Q000300 0
072 R000300 16
072 S000300 7
072 T000300 404
072 U000300 3
072 V000300 0
072 W000300 12
072 X000300 1010
072 Y000300 40
072 Z000300 1330
072AA000300 0
072BB000300 659
072CC010300 0
072CC020300 1645
072DD010300 661
072DD020300 285
072EE000300 0
073 A010300 0.1600
073 A020300 0.1300
073 B000300 0.0000
073 C000300 0.0500
074 A000300 116
074 B000300 0
074 C000300 12577
074 D000300 52097
074 E000300 0
<PAGE> PAGE 19
074 F000300 69335
074 G000300 0
074 H000300 116
074 I000300 0
074 J000300 1950
074 K000300 419
074 L000300 3630
074 M000300 31
074 N000300 140271
074 O000300 9042
074 P000300 572
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 55
074 R040300 2250
074 S000300 0
074 T000300 128352
074 U010300 8607
074 U020300 4382
074 V010300 14.94
074 V020300 14.90
074 W000300 0.0000
074 X000300 9960
074 Y000300 0
075 A000300 0
075 B000300 102393
076 000300 0.00
SIGNATURE JAMES O. YOST
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS WORLD ASSET ALLOCATION FUND CLASS A FOR THE
PERIOD ENDED FEBRUARY 28, 1995, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 3
<NAME> MFS WORLD ASSET ALLOCATION FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1995
<PERIOD-END> FEB-28-1995
<INVESTMENTS-AT-COST> 134,672,543
<INVESTMENTS-AT-VALUE> 134,125,126
<RECEIVABLES> 5,999,406
<ASSETS-OTHER> 30,913
<OTHER-ITEMS-ASSETS> 115,983
<TOTAL-ASSETS> 140,271,428
<PAYABLE-FOR-SECURITIES> 9,041,816
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,877,543
<TOTAL-LIABILITIES> 11,919,359
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 129,667,936
<SHARES-COMMON-STOCK> 3,215,494
<SHARES-COMMON-PRIOR> 1,647,855
<ACCUMULATED-NII-CURRENT> 781,449
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,349,765)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (747,551)
<NET-ASSETS> 128,352,069
<DIVIDEND-INCOME> 349,755
<INTEREST-INCOME> 1,950,454
<OTHER-INCOME> 0
<EXPENSES-NET> 969,733
<NET-INVESTMENT-INCOME> 1,330,476
<REALIZED-GAINS-CURRENT> (658,981)
<APPREC-INCREASE-CURRENT> (1,644,841)
<NET-CHANGE-FROM-OPS> (973,346)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (313,157)
<DISTRIBUTIONS-OF-GAINS> (258,501)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,841,463
<NUMBER-OF-SHARES-REDEEMED> (306,668)
<SHARES-REINVESTED> 32,843
<NET-CHANGE-IN-ASSETS> 73,168,343
<ACCUMULATED-NII-PRIOR> 111,814
<ACCUMULATED-GAINS-PRIOR> 226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 302,041
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,009,655
<AVERAGE-NET-ASSETS> 101,471,704
<PER-SHARE-NAV-BEGIN> 15.33
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> (0.41)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.21)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.94
<EXPENSE-RATIO> 1.46
<AVG-DEBT-OUTSTANDING> 0.00
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS WORLD ASSET ALLOCATION FUND CLASS B FOR THE
PERIOD ENDED FEBRUARY 28, 1995, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 3
<NAME> MFS WORLD ASSET ALLOCATION FUND CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1995
<PERIOD-END> FEB-28-1995
<INVESTMENTS-AT-COST> 134,672,543
<INVESTMENTS-AT-VALUE> 134,125,126
<RECEIVABLES> 5,999,406
<ASSETS-OTHER> 30,913
<OTHER-ITEMS-ASSETS> 115,983
<TOTAL-ASSETS> 140,271,428
<PAYABLE-FOR-SECURITIES> 9,041,816
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,877,543
<TOTAL-LIABILITIES> 11,919,359
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 129,667,936
<SHARES-COMMON-STOCK> 4,382,311
<SHARES-COMMON-PRIOR> 1,730,601
<ACCUMULATED-NII-CURRENT> 781,449
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,349,765)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (747,551)
<NET-ASSETS> 128,352,069
<DIVIDEND-INCOME> 349,755
<INTEREST-INCOME> 1,950,454
<OTHER-INCOME> 0
<EXPENSES-NET> 969,733
<NET-INVESTMENT-INCOME> 1,330,476
<REALIZED-GAINS-CURRENT> (658,981)
<APPREC-INCREASE-CURRENT> (1,644,841)
<NET-CHANGE-FROM-OPS> (973,346)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (284,843)
<DISTRIBUTIONS-OF-GAINS> (350,041)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,862,888
<NUMBER-OF-SHARES-REDEEMED> (245,488)
<SHARES-REINVESTED> 34,310
<NET-CHANGE-IN-ASSETS> 73,168,343
<ACCUMULATED-NII-PRIOR> 111,814
<ACCUMULATED-GAINS-PRIOR> 226
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 302,041
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,009,655
<AVERAGE-NET-ASSETS> 101,471,704
<PER-SHARE-NAV-BEGIN> 15.31
<PER-SHARE-NII> 0.17
<PER-SHARE-GAIN-APPREC> (0.40)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.18)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 14.90
<EXPENSE-RATIO> 2.24
<AVG-DEBT-OUTSTANDING> 0.00
<AVG-DEBT-PER-SHARE> 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS CASH RESERVE FUND CLASS A FOR THE
PERIOD ENDED FEBRUARY 28, 1995, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 2
<NAME> MFS CASH RESERVE FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1995
<PERIOD-END> FEB-28-1995
<INVESTMENTS-AT-COST> 170,448,082
<INVESTMENTS-AT-VALUE> 170,448,082
<RECEIVABLES> 559,806
<ASSETS-OTHER> 1,953
<OTHER-ITEMS-ASSETS> 193,827
<TOTAL-ASSETS> 171,203,668
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,613,461
<TOTAL-LIABILITIES> 5,613,461
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 165,590,207
<SHARES-COMMON-STOCK> 4,074,146
<SHARES-COMMON-PRIOR> 2,156,434
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 165,590,207
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6,166,797
<OTHER-INCOME> 0
<EXPENSES-NET> 2,170,301
<NET-INVESTMENT-INCOME> 3,996,496
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 0
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 68,544
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,548,870
<NUMBER-OF-SHARES-REDEEMED> 3,692,947
<SHARES-REINVESTED> 61,789
<NET-CHANGE-IN-ASSETS> (50,201,093)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 636,684
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,288,868
<AVERAGE-NET-ASSETS> 233,440,141
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.02)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> $0.01
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS MANAGED SECTORS FUND CLASS A FOR THE
PERIOD ENDED FEBRUARY 28, 1995, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> MFS MANAGED SECTORS FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1995
<PERIOD-END> FEB-28-1995
<INVESTMENTS-AT-COST> 293,581,189
<INVESTMENTS-AT-VALUE> 325,503,917
<RECEIVABLES> 8,615,529
<ASSETS-OTHER> 4,986
<OTHER-ITEMS-ASSETS> 50,498
<TOTAL-ASSETS> 334,174,930
<PAYABLE-FOR-SECURITIES> 10,385,577
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 923,543
<TOTAL-LIABILITIES> 11,309,120
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> (285,400,056)
<SHARES-COMMON-STOCK> 9,205,023
<SHARES-COMMON-PRIOR> 9,062,715
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1,427,266
<ACCUMULATED-NET-GAINS> (6,969,593)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (31,923,427)
<NET-ASSETS> 322,865,810
<DIVIDEND-INCOME> (1,507,684)
<INTEREST-INCOME> (109,945)
<OTHER-INCOME> 0
<EXPENSES-NET> 3,019,492
<NET-INVESTMENT-INCOME> (1,401,863)
<REALIZED-GAINS-CURRENT> (11,753,405)
<APPREC-INCREASE-CURRENT> (5,134,566)
<NET-CHANGE-FROM-OPS> (5,217,434)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (8,991,673)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 240,900
<NUMBER-OF-SHARES-REDEEMED> 792,609
<SHARES-REINVESTED> 694,017
<NET-CHANGE-IN-ASSETS> 12,686,779
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 19,135,268
<OVERDISTRIB-NII-PRIOR> 25,403
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,173,112
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,019,492
<AVERAGE-NET-ASSETS> 315,422,379
<PER-SHARE-NAV-BEGIN> 13.41
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 0.23
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (1.03)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.58
<EXPENSE-RATIO> $0.01
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS MANAGED SECTORS FUND CLASS B FOR THE
PERIOD ENDED FEBRUARY 28, 1995, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> MFS MANAGED SECTORS FUND CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-1995
<PERIOD-END> FEB-28-1995
<INVESTMENTS-AT-COST> 293,581,189
<INVESTMENTS-AT-VALUE> 325,503,917
<RECEIVABLES> 8,615,529
<ASSETS-OTHER> 4,986
<OTHER-ITEMS-ASSETS> 50,498
<TOTAL-ASSETS> 334,174,930
<PAYABLE-FOR-SECURITIES> 10,385,577
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 923,543
<TOTAL-LIABILITIES> 11,309,120
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> (285,400,056)
<SHARES-COMMON-STOCK> 16,489,385
<SHARES-COMMON-PRIOR> 16,033,265
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1,427,266
<ACCUMULATED-NET-GAINS> (6,969,593)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (31,923,427)
<NET-ASSETS> 322,865,810
<DIVIDEND-INCOME> (1,507,684)
<INTEREST-INCOME> (109,945)
<OTHER-INCOME> 0
<EXPENSES-NET> 3,019,492
<NET-INVESTMENT-INCOME> (1,401,863)
<REALIZED-GAINS-CURRENT> (11,753,405)
<APPREC-INCREASE-CURRENT> (5,134,108)
<NET-CHANGE-FROM-OPS> (5,217,434)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (14,927,407)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,876,249
<NUMBER-OF-SHARES-REDEEMED> 3,582,316
<SHARES-REINVESTED> 1,162,187
<NET-CHANGE-IN-ASSETS> 12,686,779
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 19,135,268
<OVERDISTRIB-NII-PRIOR> 25,403
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,173,112
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3,019,492
<AVERAGE-NET-ASSETS> 315,422,379
<PER-SHARE-NAV-BEGIN> 13.35
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> 0.23
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.95)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.56
<EXPENSE-RATIO> $0.02
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
