<PAGE> PAGE 1
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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
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<PAGE> PAGE 22
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<PAGE> PAGE 24
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<PAGE> PAGE 25
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<PAGE> PAGE 26
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<PAGE> PAGE 27
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<PAGE> PAGE 28
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<PAGE> PAGE 29
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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008 A000701 DEAN WITTER INTERCAPITAL INC.
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 36
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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008 A000901 DEAN WITTER INTERCAPITAL INC.
008 B000901 A
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015 A000901 THE BANK OF NEW YORK
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<PAGE> PAGE 41
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028 G030900 0
028 G040900 198
028 H000900 5140
045 000900 Y
046 000900 N
047 000900 Y
048 000900 0.625
048 A010900 0
048 A020900 0.000
048 B010900 0
048 B020900 0.000
048 C010900 0
048 C020900 0.000
048 D010900 0
048 D020900 0.000
048 E010900 0
048 E020900 0.000
048 F010900 0
048 F020900 0.000
048 G010900 0
048 G020900 0.000
048 H010900 0
048 H020900 0.000
048 I010900 0
048 I020900 0.000
048 J010900 0
048 J020900 0.000
048 K010900 0
048 K020900 0.000
055 A000900 N
<PAGE> PAGE 42
055 B000900 N
056 000900 Y
057 000900 N
062 A000900 N
062 B000900 0.0
062 C000900 0.0
062 D000900 0.0
062 E000900 0.0
062 F000900 0.0
062 G000900 0.0
062 H000900 0.0
062 I000900 0.0
062 J000900 0.0
062 K000900 0.0
062 L000900 0.0
062 M000900 0.0
062 N000900 0.0
062 O000900 0.0
062 P000900 0.0
062 Q000900 0.0
062 R000900 0.0
066 A000900 Y
066 B000900 N
066 C000900 N
066 D000900 Y
066 E000900 N
066 F000900 N
066 G000900 N
067 000900 N
068 A000900 N
068 B000900 N
069 000900 N
070 A010900 Y
070 A020900 N
070 B010900 Y
070 B020900 N
070 C010900 Y
070 C020900 N
070 D010900 Y
070 D020900 N
070 E010900 Y
070 E020900 N
070 F010900 Y
070 F020900 N
070 G010900 Y
070 G020900 N
070 H010900 Y
070 H020900 N
070 I010900 N
070 I020900 N
070 J010900 Y
<PAGE> PAGE 43
070 J020900 N
070 K010900 N
070 K020900 N
070 L010900 Y
070 L020900 Y
070 M010900 N
070 M020900 N
070 N010900 Y
070 N020900 N
070 O010900 Y
070 O020900 N
070 P010900 Y
070 P020900 N
070 Q010900 N
070 Q020900 N
070 R010900 N
070 R020900 N
071 A000900 6147
071 B000900 1414
071 C000900 2273
071 D000900 62
072 A000900 6
072 B000900 14
072 C000900 13
072 D000900 0
072 E000900 0
072 F000900 7
072 G000900 0
072 H000900 0
072 I000900 0
072 J000900 4
072 K000900 0
072 L000900 4
072 M000900 0
072 N000900 2
072 O000900 0
072 P000900 0
072 Q000900 0
072 R000900 15
072 S000900 1
072 T000900 0
072 U000900 1
072 V000900 0
072 W000900 1
072 X000900 35
072 Y000900 35
072 Z000900 27
072AA000900 0
072BB000900 0
072CC010900 459
072CC020900 0
<PAGE> PAGE 44
072DD010900 21
072DD020900 0
072EE000900 0
073 A010900 0.1147
073 A020900 0.0000
073 B000900 0.0000
073 C000900 0.0000
074 A000900 89
074 B000900 0
074 C000900 900
074 D000900 0
074 E000900 60
074 F000900 5711
074 G000900 0
074 H000900 0
074 I000900 0
074 J000900 56
074 K000900 7
074 L000900 69
074 M000900 7
074 N000900 6899
074 O000900 267
074 P000900 340
074 Q000900 0
074 R010900 0
074 R020900 0
074 R030900 0
074 R040900 41
074 S000900 0
074 T000900 6251
074 U010900 538
074 U020900 0
074 V010900 11.62
074 V020900 0.00
074 W000900 0.0000
074 X000900 586
074 Y000900 0
075 A000900 0
075 B000900 2425
076 000900 0.00
008 A001001 DEAN WITTER INTERCAPITAL INC.
008 B001001 A
008 C001001 801-42061
008 D011001 NEW YORK
008 D021001 NY
008 D031001 10048
008 A001002 DELETE
015 A001001 THE BANK OF NEW YORK
015 B001001 C
015 C011001 MANHATTAN
015 C021001 NY
<PAGE> PAGE 45
015 C031001 10286
015 E011001 X
024 001000 N
025 D001001 0
025 D001002 0
025 D001003 0
025 D001004 0
025 D001005 0
025 D001006 0
025 D001007 0
025 D001008 0
028 A011000 372
028 A021000 3
028 A031000 0
028 A041000 0
028 B011000 233
028 B021000 4
028 B031000 0
028 B041000 10
028 C011000 367
028 C021000 3
028 C031000 0
028 C041000 161
028 D011000 328
028 D021000 8
028 D031000 0
028 D041000 0
028 E011000 898
028 E021000 8
028 E031000 0
028 E041000 196
028 F011000 1070
028 F021000 5
028 F031000 0
028 F041000 8
028 G011000 3268
028 G021000 31
028 G031000 0
028 G041000 375
028 H001000 0
045 001000 Y
046 001000 N
047 001000 Y
048 001000 1.000
048 A011000 0
048 A021000 0.000
048 B011000 0
048 B021000 0.000
048 C011000 0
048 C021000 0.000
048 D011000 0
<PAGE> PAGE 46
048 D021000 0.000
048 E011000 0
048 E021000 0.000
048 F011000 0
048 F021000 0.000
048 G011000 0
048 G021000 0.000
048 H011000 0
048 H021000 0.000
048 I011000 0
048 I021000 0.000
048 J011000 0
048 J021000 0.000
048 K011000 0
048 K021000 0.000
055 A001000 N
055 B001000 N
056 001000 Y
057 001000 N
062 A001000 N
062 B001000 0.0
062 C001000 0.0
062 D001000 0.0
062 E001000 0.0
062 F001000 0.0
062 G001000 0.0
062 H001000 0.0
062 I001000 0.0
062 J001000 0.0
062 K001000 0.0
062 L001000 0.0
062 M001000 0.0
062 N001000 0.0
062 O001000 0.0
062 P001000 0.0
062 Q001000 0.0
062 R001000 0.0
066 A001000 Y
066 B001000 N
066 C001000 Y
066 D001000 N
066 E001000 N
066 F001000 N
066 G001000 N
067 001000 N
068 A001000 N
068 B001000 N
069 001000 N
070 A011000 Y
070 A021000 N
070 B011000 Y
<PAGE> PAGE 47
070 B021000 N
070 C011000 Y
070 C021000 N
070 D011000 Y
070 D021000 N
070 E011000 Y
070 E021000 N
070 F011000 Y
070 F021000 N
070 G011000 Y
070 G021000 N
070 H011000 Y
070 H021000 N
070 I011000 Y
070 I021000 N
070 J011000 Y
070 J021000 N
070 K011000 Y
070 K021000 N
070 L011000 Y
070 L021000 N
070 M011000 Y
070 M021000 N
070 N011000 Y
070 N021000 N
070 O011000 Y
070 O021000 N
070 P011000 Y
070 P021000 N
070 Q011000 N
070 Q021000 N
070 R011000 N
070 R021000 N
071 A001000 2699
071 B001000 578
071 C001000 1767
071 D001000 33
072 A001000 6
072 B001000 22
072 C001000 19
072 D001000 0
072 E001000 0
072 F001000 11
072 G001000 0
072 H001000 0
072 I001000 0
072 J001000 2
072 K001000 0
072 L001000 0
072 M001000 7
072 N001000 0
<PAGE> PAGE 48
072 O001000 1
072 P001000 1
072 Q001000 0
072 R001000 22
072 S001000 1
072 T001000 0
072 U001000 1
072 V001000 0
072 W001000 0
072 X001000 46
072 Y001000 46
072 Z001000 41
072AA001000 0
072BB001000 6
072CC011000 170
072CC021000 0
072DD011000 31
072DD021000 0
072EE001000 0
073 A011000 0.1559
073 A021000 0.0000
073 B001000 0.0000
073 C001000 0.0000
074 A001000 2
074 B001000 0
074 C001000 1445
074 D001000 0
074 E001000 40
074 F001000 3219
074 G001000 0
074 H001000 0
074 I001000 0
074 J001000 0
074 K001000 0
074 L001000 67
074 M001000 7
074 N001000 4780
074 O001000 428
074 P001000 3
074 Q001000 0
074 R011000 0
074 R021000 0
074 R031000 0
074 R041000 57
074 S001000 0
074 T001000 4292
074 U011000 410
074 U021000 0
074 V011000 10.48
074 V021000 0.00
074 W001000 0.0000
<PAGE> PAGE 49
074 X001000 458
074 Y001000 0
075 A001000 0
075 B001000 2285
076 001000 0.00
008 A001101 DEAN WITTER INTERCAPITAL INC.
008 B001101 A
008 C001101 801-42061
008 D011101 NEW YORK
008 D021101 NY
008 D031101 10048
008 A001102 DELETE
015 A001101 THE BANK OF NEW YORK
015 B001101 C
015 C011101 MANHATTAN
015 C021101 NY
015 C031101 10286
015 E011101 X
024 001100 N
025 D001101 0
025 D001102 0
025 D001103 0
025 D001104 0
025 D001105 0
025 D001106 0
025 D001107 0
025 D001108 0
028 A011100 142
028 A021100 0
028 A031100 1
028 A041100 5
028 B011100 247
028 B021100 0
028 B031100 1
028 B041100 0
028 C011100 195
028 C021100 0
028 C031100 2
028 C041100 0
028 D011100 594
028 D021100 0
028 D031100 3
028 D041100 0
028 E011100 599
028 E021100 0
028 E031100 2
028 E041100 364
028 F011100 1063
028 F021100 0
028 F031100 3
028 F041100 313
<PAGE> PAGE 50
028 G011100 2840
028 G021100 0
028 G031100 12
028 G041100 682
028 H001100 2840
045 001100 Y
046 001100 N
047 001100 Y
048 001100 0.500
048 A011100 0
048 A021100 0.000
048 B011100 0
048 B021100 0.000
048 C011100 0
048 C021100 0.000
048 D011100 0
048 D021100 0.000
048 E011100 0
048 E021100 0.000
048 F011100 0
048 F021100 0.000
048 G011100 0
048 G021100 0.000
048 H011100 0
048 H021100 0.000
048 I011100 0
048 I021100 0.000
048 J011100 0
048 J021100 0.000
048 K011100 0
048 K021100 0.000
055 A001100 N
055 B001100 N
056 001100 Y
057 001100 N
062 A001100 N
062 B001100 0.0
062 C001100 0.0
062 D001100 0.0
062 E001100 0.0
062 F001100 0.0
062 G001100 0.0
062 H001100 0.0
062 I001100 0.0
062 J001100 0.0
062 K001100 0.0
062 L001100 0.0
062 M001100 0.0
062 N001100 0.0
062 O001100 0.0
062 P001100 0.0
<PAGE> PAGE 51
062 Q001100 0.0
062 R001100 0.0
066 A001100 Y
066 B001100 N
066 C001100 Y
066 D001100 N
066 E001100 N
066 F001100 N
066 G001100 N
067 001100 N
068 A001100 N
068 B001100 N
069 001100 N
070 A011100 Y
070 A021100 N
070 B011100 N
070 B021100 N
070 C011100 N
070 C021100 N
070 D011100 N
070 D021100 N
070 E011100 N
070 E021100 N
070 F011100 N
070 F021100 N
070 G011100 N
070 G021100 N
070 H011100 N
070 H021100 N
070 I011100 N
070 I021100 N
070 J011100 N
070 J021100 N
070 K011100 Y
070 K021100 N
070 L011100 Y
070 L021100 N
070 M011100 N
070 M021100 Y
070 N011100 Y
070 N021100 N
070 O011100 Y
070 O021100 N
070 P011100 Y
070 P021100 N
070 Q011100 N
070 Q021100 N
070 R011100 N
070 R021100 N
071 A001100 2212
071 B001100 288
<PAGE> PAGE 52
071 C001100 888
071 D001100 32
072 A001100 6
072 B001100 11
072 C001100 1
072 D001100 0
072 E001100 0
072 F001100 3
072 G001100 0
072 H001100 0
072 I001100 0
072 J001100 5
072 K001100 0
072 L001100 2
072 M001100 0
072 N001100 1
072 O001100 1
072 P001100 0
072 Q001100 0
072 R001100 6
072 S001100 1
072 T001100 0
072 U001100 0
072 V001100 0
072 W001100 0
072 X001100 19
072 Y001100 19
072 Z001100 12
072AA001100 37
072BB001100 19
072CC011100 336
072CC021100 0
072DD011100 12
072DD021100 0
072EE001100 0
073 A011100 0.1356
073 A021100 0.0000
073 B001100 0.0000
073 C001100 0.0000
074 A001100 3
074 B001100 0
074 C001100 720
074 D001100 0
074 E001100 0
074 F001100 2367
074 G001100 0
074 H001100 0
074 I001100 0
074 J001100 52
074 K001100 2
074 L001100 12
<PAGE> PAGE 53
074 M001100 7
074 N001100 3163
074 O001100 232
074 P001100 12
074 Q001100 0
074 R011100 0
074 R021100 0
074 R031100 0
074 R041100 18
074 S001100 0
074 T001100 2901
074 U011100 233
074 U021100 0
074 V011100 12.45
074 V021100 0.00
074 W001100 0.0000
074 X001100 302
074 Y001100 0
075 A001100 0
075 B001100 1190
076 001100 0.00
008 A001201 DEAN WITTER INTERCAPITAL INC.
008 B001201 A
008 C001201 801-42061
008 D011201 NEW YORK
008 D021201 NY
008 D031201 10048
008 A001202 TCW FUNDS MANAGEMENT,INC.
008 B001202 S
008 C001202 801-29075
008 D011202 LOS ANGELES
008 D021202 CA
008 D031202 10048
015 A001201 THE CHASE MANHATTAN BANK,N.A.
015 B001201 C
015 C011201 NEW YORK
015 C021201 NY
015 C031201 10005
015 E011201 X
024 001200 N
025 D001201 0
025 D001202 0
025 D001203 0
025 D001204 0
025 D001205 0
025 D001206 0
025 D001207 0
025 D001208 0
028 A011200 138
028 A021200 1
028 A031200 0
<PAGE> PAGE 54
028 A041200 5
028 B011200 172
028 B021200 2
028 B031200 0
028 B041200 16
028 C011200 156
028 C021200 3
028 C031200 0
028 C041200 0
028 D011200 200
028 D021200 4
028 D031200 0
028 D041200 0
028 E011200 140
028 E021200 4
028 E031200 0
028 E041200 0
028 F011200 175
028 F021200 4
028 F031200 0
028 F041200 11
028 G011200 981
028 G021200 18
028 G031200 0
028 G041200 32
028 H001200 0
045 001200 Y
046 001200 N
047 001200 Y
048 001200 1.250
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048 B011200 0
048 B021200 0.000
048 C011200 0
048 C021200 0.000
048 D011200 0
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048 E021200 0.000
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048 F021200 0.000
048 G011200 0
048 G021200 0.000
048 H011200 0
048 H021200 0.000
048 I011200 0
048 I021200 0.000
048 J011200 0
048 J021200 0.000
048 K011200 0
<PAGE> PAGE 55
048 K021200 0.000
055 A001200 N
055 B001200 N
056 001200 Y
057 001200 N
062 A001200 N
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062 C001200 0.0
062 D001200 0.0
062 E001200 0.0
062 F001200 0.0
062 G001200 0.0
062 H001200 0.0
062 I001200 0.0
062 J001200 0.0
062 K001200 0.0
062 L001200 0.0
062 M001200 0.0
062 N001200 0.0
062 O001200 0.0
062 P001200 0.0
062 Q001200 0.0
062 R001200 0.0
066 A001200 Y
066 B001200 Y
066 C001200 N
066 D001200 N
066 E001200 N
066 F001200 N
066 G001200 N
067 001200 N
068 A001200 N
068 B001200 N
069 001200 N
070 A011200 Y
070 A021200 N
070 B011200 Y
070 B021200 N
070 C011200 Y
070 C021200 N
070 D011200 N
070 D021200 N
070 E011200 Y
070 E021200 N
070 F011200 Y
070 F021200 N
070 G011200 Y
070 G021200 N
070 H011200 Y
070 H021200 N
070 I011200 Y
<PAGE> PAGE 56
070 I021200 N
070 J011200 Y
070 J021200 Y
070 K011200 Y
070 K021200 N
070 L011200 Y
070 L021200 Y
070 M011200 Y
070 M021200 Y
070 N011200 Y
070 N021200 N
070 O011200 Y
070 O021200 N
070 P011200 Y
070 P021200 N
070 Q011200 N
070 Q021200 N
070 R011200 N
070 R021200 N
071 A001200 1233
071 B001200 44
071 C001200 5
071 D001200 4
072 A001200 6
072 B001200 18
072 C001200 2
072 D001200 0
072 E001200 0
072 F001200 6
072 G001200 0
072 H001200 0
072 I001200 0
072 J001200 1
072 K001200 0
072 L001200 2
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072 N001200 0
072 O001200 0
072 P001200 0
072 Q001200 0
072 R001200 7
072 S001200 1
072 T001200 0
072 U001200 1
072 V001200 0
072 W001200 1
072 X001200 19
072 Y001200 19
072 Z001200 19
072AA001200 2
072BB001200 4
<PAGE> PAGE 57
072CC011200 0
072CC021200 35
072DD011200 18
072DD021200 0
072EE001200 0
073 A011200 0.2168
073 A021200 0.0000
073 B001200 0.0000
073 C001200 0.0000
074 A001200 235
074 B001200 0
074 C001200 0
074 D001200 22
074 E001200 34
074 F001200 1096
074 G001200 0
074 H001200 0
074 I001200 0
074 J001200 0
074 K001200 12
074 L001200 8
074 M001200 7
074 N001200 1414
074 O001200 20
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074 Q001200 0
074 R011200 0
074 R021200 0
074 R031200 0
074 R041200 16
074 S001200 0
074 T001200 1378
074 U011200 141
074 U021200 0
074 V011200 9.75
074 V021200 0.00
074 W001200 0.0000
074 X001200 196
074 Y001200 0
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075 B001200 894
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SIGNATURE SHELDON CURTIS
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Series 1 - Dean Witter Select Dimensions Investment Series
Money Market Portfolio
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> MONEY MARKET
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 9,821,544
<INVESTMENTS-AT-VALUE> 9,821,544
<RECEIVABLES> 198,193
<ASSETS-OTHER> 36,684
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 10,056,421
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 35,251
<TOTAL-LIABILITIES> 35,251
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10,021,160
<SHARES-COMMON-STOCK> 10,021,160
<SHARES-COMMON-PRIOR> 1,233,947
<ACCUMULATED-NII-CURRENT> 10
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 10,021,170
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 131,004
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 131,004
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 131,004
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (130,994)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 11,786,815
<NUMBER-OF-SHARES-REDEEMED> (3,130,597)
<SHARES-REINVESTED> 130,995
<NET-CHANGE-IN-ASSETS> 8,787,223
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 10,593
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 35,430
<AVERAGE-NET-ASSETS> 4,248,709
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .03
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.03)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 3.84
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 2 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
NORTH AMERICAN GOVERNMENT
</LEGEND>
<SERIES>
<NUMBER> 2
<NAME> NORTH AMERICAN GOVERNMENT
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 529,326
<INVESTMENTS-AT-VALUE> 530,113
<RECEIVABLES> 5,959
<ASSETS-OTHER> 30,253
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 566,325
<PAYABLE-FOR-SECURITIES> 66,873
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 15,485
<TOTAL-LIABILITIES> 82,358
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 481,362
<SHARES-COMMON-STOCK> 47,935
<SHARES-COMMON-PRIOR> 12,201
<ACCUMULATED-NII-CURRENT> 1,822
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 787
<NET-ASSETS> 483,967
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6,196
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 6,196
<REALIZED-GAINS-CURRENT> (4)
<APPREC-INCREASE-CURRENT> 787
<NET-CHANGE-FROM-OPS> 6,979
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4,869)
<DISTRIBUTIONS-OF-GAINS> 0,979
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 36,595
<NUMBER-OF-SHARES-REDEEMED> (1,347)
<SHARES-REINVESTED> 486
<NET-CHANGE-IN-ASSETS> 361,474
<ACCUMULATED-NII-PRIOR> 495
<ACCUMULATED-GAINS-PRIOR> 086
<OVERDISTRIB-NII-PRIOR> 061,474
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 14,071
<AVERAGE-NET-ASSETS> 243,316
<PER-SHARE-NAV-BEGIN> 10.04
<PER-SHARE-NII> .22
<PER-SHARE-GAIN-APPREC> .06
<PER-SHARE-DIVIDEND> .22
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.10
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 3 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
DIVERSIFIED PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 3
<NAME> DIVERSIFIED
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 2,282,399
<INVESTMENTS-AT-VALUE> 2,282,395
<RECEIVABLES> 15,809
<ASSETS-OTHER> 33,698
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,331,902
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 34,448
<TOTAL-LIABILITIES> 34,448
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,292,532
<SHARES-COMMON-STOCK> 228,164
<SHARES-COMMON-PRIOR> 40,034
<ACCUMULATED-NII-CURRENT> 9,038
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,881)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (2,235)
<NET-ASSETS> 2,297,454
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 31,862
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 31,862
<REALIZED-GAINS-CURRENT> (1,881)
<APPREC-INCREASE-CURRENT> (2,235)
<NET-CHANGE-FROM-OPS> 27,746
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (24,000)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 243,263
<NUMBER-OF-SHARES-REDEEMED> (57,526)
<SHARES-REINVESTED> 2,393,154
<NET-CHANGE-IN-ASSETS> 1,895,154
<ACCUMULATED-NII-PRIOR> 1,176
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,159
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20,123
<AVERAGE-NET-ASSETS> 1,088,167
<PER-SHARE-NAV-BEGIN> 10.05
<PER-SHARE-NII> .25
<PER-SHARE-GAIN-APPREC> .01
<PER-SHARE-DIVIDEND> (.24)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.07
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 4 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
BALANCED PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 4
<NAME> BALANCED
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 4,494,829
<INVESTMENTS-AT-VALUE> 4,760,495
<RECEIVABLES> 125,732
<ASSETS-OTHER> 15,697
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,901,924
<PAYABLE-FOR-SECURITIES> 411,389
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43,768
<TOTAL-LIABILITIES> 455,157
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,146,547
<SHARES-COMMON-STOCK> 397,182
<SHARES-COMMON-PRIOR> 79,245
<ACCUMULATED-NII-CURRENT> 12,427
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22,127
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 265,666
<NET-ASSETS> 4,446,767
<DIVIDEND-INCOME> 13,527
<INTEREST-INCOME> 40,781
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 54,308
<REALIZED-GAINS-CURRENT> 22,127
<APPREC-INCREASE-CURRENT> 266,093
<NET-CHANGE-FROM-OPS> 342,528
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 44,880
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 415,310
<NUMBER-OF-SHARES-REDEEMED> 101,671
<SHARES-REINVESTED> 4,298
<NET-CHANGE-IN-ASSETS> 3,651,240
<ACCUMULATED-NII-PRIOR> 2,999
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,940
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 42,095
<AVERAGE-NET-ASSETS> 2,029,141
<PER-SHARE-NAV-BEGIN> 10.04
<PER-SHARE-NII> 0.21
<PER-SHARE-GAIN-APPREC> 1.17
<PER-SHARE-DIVIDEND> 0.22
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.20
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 5 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
UTILITIES PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 5
<NAME> UTILITIES
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 4,046,578
<INVESTMENTS-AT-VALUE> 4,168,417
<RECEIVABLES> 19,222
<ASSETS-OTHER> 62,818
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,250,457
<PAYABLE-FOR-SECURITIES> 316,075
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 31,226
<TOTAL-LIABILITIES> 347,301
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3,764,557
<SHARES-COMMON-STOCK> 359,100
<SHARES-COMMON-PRIOR> 49,584
<ACCUMULATED-NII-CURRENT> 14,052
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,708
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 121,839
<NET-ASSETS> 3,903,156
<DIVIDEND-INCOME> 25,872
<INTEREST-INCOME> 14,467
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 40,339
<REALIZED-GAINS-CURRENT> 2,708
<APPREC-INCREASE-CURRENT> 122,131
<NET-CHANGE-FROM-OPS> 165,178
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 27,947
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 396,995
<NUMBER-OF-SHARES-REDEEMED> (90,156)
<SHARES-REINVESTED> 2,677
<NET-CHANGE-IN-ASSETS> 3,405,236
<ACCUMULATED-NII-PRIOR> 1,660
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5,035
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 27,897
<AVERAGE-NET-ASSETS> 1,562,196
<PER-SHARE-NAV-BEGIN> 10.04
<PER-SHARE-NII> .17
<PER-SHARE-GAIN-APPREC> .88
<PER-SHARE-DIVIDEND> (.22)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.87
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 6 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
DIVIDEND GROWTH PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 6
<NAME> DIVIDEND GROWTH
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 15,976,282
<INVESTMENTS-AT-VALUE> 16,859,643
<RECEIVABLES> 133,655
<ASSETS-OTHER> 9,106
<OTHER-ITEMS-ASSETS> 1
<TOTAL-ASSETS> 17,002,404
<PAYABLE-FOR-SECURITIES> 1,606,535
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 65,586
<TOTAL-LIABILITIES> 1,672,121
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> ,14,392,646
<SHARES-COMMON-STOCK> 1,290,238
<SHARES-COMMON-PRIOR> 138,136
<ACCUMULATED-NII-CURRENT> 45,341
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 8,935
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 883,361
<NET-ASSETS> 15,330,283
<DIVIDEND-INCOME> 97,617
<INTEREST-INCOME> 20,018
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 117,635
<REALIZED-GAINS-CURRENT> 8,935
<APPREC-INCREASE-CURRENT> 881,967
<NET-CHANGE-FROM-OPS> 1,008,537
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (77,311)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,192,299
<NUMBER-OF-SHARES-REDEEMED> (47,133)
<SHARES-REINVESTED> 6,936
<NET-CHANGE-IN-ASSETS> 13,952,569
<ACCUMULATED-NII-PRIOR> 5,017
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 17,068
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 63,884
<AVERAGE-NET-ASSETS> 5,506,980
<PER-SHARE-NAV-BEGIN> 9.97
<PER-SHARE-NII> .18
<PER-SHARE-GAIN-APPREC> 1.91
<PER-SHARE-DIVIDEND> (.18)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.88
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 7 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
VALUE-ADDED MARKET SERIES PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 7
<NAME> VALUE-ADDED MARKET
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 4,842,998
<INVESTMENTS-AT-VALUE> 5,061,781
<RECEIVABLES> 33,943
<ASSETS-OTHER> 12,266
<OTHER-ITEMS-ASSETS> 14,727
<TOTAL-ASSETS> 5,122,717
<PAYABLE-FOR-SECURITIES> 763,692
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 21,238
<TOTAL-LIABILITIES> 784,930
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,106,754
<SHARES-COMMON-STOCK> 384,054
<SHARES-COMMON-PRIOR> 35,237
<ACCUMULATED-NII-CURRENT> 9,148
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,102
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 218,783
<NET-ASSETS> 4,337,787
<DIVIDEND-INCOME> 16,664
<INTEREST-INCOME> 14,710
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 31,374
<REALIZED-GAINS-CURRENT> 3,102
<APPREC-INCREASE-CURRENT> 216,647
<NET-CHANGE-FROM-OPS> 251,123
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (23,018)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 383,190
<NUMBER-OF-SHARES-REDEEMED> (36,509)
<SHARES-REINVESTED> 2,136
<NET-CHANGE-IN-ASSETS> 3,989,092
<ACCUMULATED-NII-PRIOR> 792
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,365
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 30,202
<AVERAGE-NET-ASSETS> 1,760,376
<PER-SHARE-NAV-BEGIN> 9.90
<PER-SHARE-NII> 0.15
<PER-SHARE-GAIN-APPREC> 1.39
<PER-SHARE-DIVIDEND> (.15)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.29
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 8 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
CORE EQUITY PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 8
<NAME> CORE EQUITY
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 819,695
<INVESTMENTS-AT-VALUE> 855,529
<RECEIVABLES> 32,697
<ASSETS-OTHER> 99,649
<OTHER-ITEMS-ASSETS> 7,266
<TOTAL-ASSETS> 995,141
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13,703
<TOTAL-LIABILITIES> 13,703
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 945,412
<SHARES-COMMON-STOCK> 93,922
<SHARES-COMMON-PRIOR> 31,445
<ACCUMULATED-NII-CURRENT> 619
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (427)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 35,834
<NET-ASSETS> 981,438
<DIVIDEND-INCOME> 844
<INTEREST-INCOME> 13,669
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 14,513
<REALIZED-GAINS-CURRENT> (427)
<APPREC-INCREASE-CURRENT> 35,834
<NET-CHANGE-FROM-OPS> 49,920
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (14,995)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 61,783
<NUMBER-OF-SHARES-REDEEMED> (799)
<SHARES-REINVESTED> 1,493
<NET-CHANGE-IN-ASSETS> 665,484
<ACCUMULATED-NII-PRIOR> 1,101
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,876
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 13,682
<AVERAGE-NET-ASSETS> 682,341
<PER-SHARE-NAV-BEGIN> 10.05
<PER-SHARE-NII> .20
<PER-SHARE-GAIN-APPREC> .43
<PER-SHARE-DIVIDEND> (0.23)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.45
<EXPENSE-RATIO> 0
<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>
SERIES 9 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
AMERICAN VALUE PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> NINE
<NAME> AMERICAN VALUE
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 6,196,529
<INVESTMENTS-AT-VALUE> 6,670,285
<RECEIVABLES> 131,948
<ASSETS-OTHER> 96,596
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6,898,829
<PAYABLE-FOR-SECURITIES> 596,788
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 51,448
<TOTAL-LIABILITIES> 648,236
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 5,772,980
<SHARES-COMMON-STOCK> 537,877
<SHARES-COMMON-PRIOR> 81,830
<ACCUMULATED-NII-CURRENT> 7,662
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3,805)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 473,756
<NET-ASSETS> 6,250,593
<DIVIDEND-INCOME> 12,924
<INTEREST-INCOME> 13,900
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 26,824
<REALIZED-GAINS-CURRENT> (362)
<APPREC-INCREASE-CURRENT> 459,471
<NET-CHANGE-FROM-OPS> 485,933
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 21,315
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 472,367
<NUMBER-OF-SHARES-REDEEMED> 18,330
<SHARES-REINVESTED> 2,010
<NET-CHANGE-IN-ASSETS> 5,427,890
<ACCUMULATED-NII-PRIOR> 2,153
<ACCUMULATED-GAINS-PRIOR> (3,443)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 7,515
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 34,830
<AVERAGE-NET-ASSETS> 2,424,673
<PER-SHARE-NAV-BEGIN> 10.05
<PER-SHARE-NII> .10
<PER-SHARE-GAIN-APPREC> 1.58
<PER-SHARE-DIVIDEND> (.11)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.62
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 10 - DEAN WITTER SELECT DIMENSIONS INVESTMENT TRUST
GLOBAL EQUITY PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 10
<NAME> GLOBAL EQUITY
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 4,535,490
<INVESTMENTS-AT-VALUE> 4,703,945
<RECEIVABLES> 66,873
<ASSETS-OTHER> 9,291
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,780,109
<PAYABLE-FOR-SECURITIES> 428,309
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 59,910
<TOTAL-LIABILITIES> 488,219
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,116,998
<SHARES-COMMON-STOCK> 409,537
<SHARES-COMMON-PRIOR> 120,161
<ACCUMULATED-NII-CURRENT> 12,280
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (5955)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 168,567
<NET-ASSETS> 4,291,890
<DIVIDEND-INCOME> 19,270
<INTEREST-INCOME> 21,299
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 40,569
<REALIZED-GAINS-CURRENT> (5,955)
<APPREC-INCREASE-CURRENT> 169,851
<NET-CHANGE-FROM-OPS> 204,465
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (31,287)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 323,625
<NUMBER-OF-SHARES-REDEEMED> (37,406)
<SHARES-REINVESTED> 3,157
<NET-CHANGE-IN-ASSETS> 3,097,472
<ACCUMULATED-NII-PRIOR> 2,998
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 11,331
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 46,263
<AVERAGE-NET-ASSETS> 2,284,986
<PER-SHARE-NAV-BEGIN> 9.94
<PER-SHARE-NII> .16
<PER-SHARE-GAIN-APPREC> .54
<PER-SHARE-DIVIDEND> (.16)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.48
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 11 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
DEVELOPING GROWTH PORTFOLIO
</LEGEND>
<SERIES>
<NUMBER> 11
<NAME> DEVELOPING GROWTH
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 2,751,141
<INVESTMENTS-AT-VALUE> 3,086,890
<RECEIVABLES> 65,951
<ASSETS-OTHER> 7,266
<OTHER-ITEMS-ASSETS> 2,877
<TOTAL-ASSETS> 3,162,984
<PAYABLE-FOR-SECURITIES> 243,427
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 18,843
<TOTAL-LIABILITIES> 262,270
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,545,152
<SHARES-COMMON-STOCK> 233,036
<SHARES-COMMON-PRIOR> 37,522
<ACCUMULATED-NII-CURRENT> 1,661
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 18,152
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 335,749
<NET-ASSETS> 2,900,714
<DIVIDEND-INCOME> 992
<INTEREST-INCOME> 11,082
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 12,074
<REALIZED-GAINS-CURRENT> 18,201
<APPREC-INCREASE-CURRENT> 332,844
<NET-CHANGE-FROM-OPS> 363,119
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (11,585)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 254,794
<NUMBER-OF-SHARES-REDEEMED> (60,367)
<SHARES-REINVESTED> 1,087
<NET-CHANGE-IN-ASSETS> 2,520,537
<ACCUMULATED-NII-PRIOR> 1,172
<ACCUMULATED-GAINS-PRIOR> (49)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,952
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,455
<AVERAGE-NET-ASSETS> 1,190,490
<PER-SHARE-NAV-BEGIN> 10.13
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 2.34
<PER-SHARE-DIVIDEND> (0.14)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.45
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
SERIES 12 - DEAN WITTER SELECT DIMENSIONS INVESTMENT SERIES
EMERGING MARKETS
</LEGEND>
<SERIES>
<NUMBER> 12
<NAME> EMERGING MARKETS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-END> JUN-30-1995
<INVESTMENTS-AT-COST> 1,187,141
<INVESTMENTS-AT-VALUE> 1,151,845
<RECEIVABLES> 20,025
<ASSETS-OTHER> 242,245
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,414,115
<PAYABLE-FOR-SECURITIES> 20,722
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 15,519
<TOTAL-LIABILITIES> 36,241
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,413,311
<SHARES-COMMON-STOCK> 141,319
<SHARES-COMMON-PRIOR> 44,578
<ACCUMULATED-NII-CURRENT> 2,505
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,646)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (35,296)
<NET-ASSETS> 1,377,874
<DIVIDEND-INCOME> 1,592
<INTEREST-INCOME> 17,778
<OTHER-INCOME> 0
<EXPENSES-NET> 0
<NET-INVESTMENT-INCOME> 19,370
<REALIZED-GAINS-CURRENT> (2,646)
<APPREC-INCREASE-CURRENT> (35,296)
<NET-CHANGE-FROM-OPS> (18,572)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (18,301)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 98,158
<NUMBER-OF-SHARES-REDEEMED> 3,246
<SHARES-REINVESTED> 1,829
<NET-CHANGE-IN-ASSETS> 930,158
<ACCUMULATED-NII-PRIOR> 1,436
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 5,541
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 18,026
<AVERAGE-NET-ASSETS> 893,957
<PER-SHARE-NAV-BEGIN> 10.04
<PER-SHARE-NII> 0.21
<PER-SHARE-GAIN-APPREC> (0.28)
<PER-SHARE-DIVIDEND> (0.22)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.75
<EXPENSE-RATIO> 0
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
