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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 6
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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 23
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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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<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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<PAGE> PAGE 41
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008 A000901 GRANAHAN INVESTMENT MANAGEMENT, INC.
008 B000901 A
008 C000901 801-23705
008 D010901 WALTHAM
008 D020901 MA
008 D030901 02154
015 A000901 FIRST UNION NATIONAL BANK
015 B000901 C
015 C010901 PHILADELPHIA
015 C020901 PA
015 C030901 19106
015 E010901 X
024 000900 N
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<PAGE> PAGE 42
028 B030900 0
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047 000900 N
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<PAGE> PAGE 43
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048 K020900 0.000
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050 000900 N
051 000900 Y
052 000900 N
053 A000900 N
054 A000900 N
054 B000900 N
054 C000900 N
054 D000900 N
054 E000900 N
054 F000900 N
054 G000900 N
054 H000900 N
054 I000900 N
054 J000900 N
054 K000900 N
054 L000900 N
054 M000900 Y
054 N000900 N
054 O000900 N
055 A000900 N
055 B000900 N
056 000900 Y
057 000900 N
062 A000900 N
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<PAGE> PAGE 44
063 B000900 0.0
066 A000900 Y
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066 D000900 N
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 Y
070 B010900 Y
070 B020900 N
070 C010900 N
070 C020900 N
070 D010900 Y
070 D020900 N
070 E010900 N
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
070 J020900 N
070 K010900 Y
070 K020900 N
070 L010900 Y
070 L020900 N
070 M010900 N
070 M020900 N
070 N010900 Y
070 N020900 Y
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 131793
071 B000900 113640
071 C000900 133908
<PAGE> PAGE 45
071 D000900 85
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<PAGE> PAGE 46
074 N000900 181408
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076 000900 0.00
015 A001001 FIRST UNION NATIONAL BANK
015 B001001 C
015 C011001 PHILADELPHIA
015 C021001 PA
015 C031001 19106
015 E011001 X
024 001000 N
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<PAGE> PAGE 47
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045 001000 N
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055 A001000 Y
055 B001000 N
056 001000 N
057 001000 N
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<PAGE> PAGE 48
062 K001000 0.0
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066 A001000 Y
066 B001000 N
066 C001000 N
066 D001000 Y
066 E001000 N
066 F001000 N
066 G001000 N
067 001000 N
068 A001000 N
068 B001000 N
069 001000 Y
070 A011000 Y
070 A021000 Y
070 B011000 Y
070 B021000 N
070 C011000 N
070 C021000 N
070 D011000 Y
070 D021000 N
070 E011000 N
070 E021000 N
070 F011000 Y
070 F021000 N
070 G011000 Y
070 G021000 N
070 H011000 Y
070 H021000 N
070 I011000 N
070 I021000 N
070 J011000 Y
070 J021000 N
070 K011000 Y
070 K021000 N
070 L011000 Y
070 L021000 N
070 M011000 N
070 M021000 N
070 N011000 Y
070 N021000 Y
070 O011000 Y
070 O021000 N
<PAGE> PAGE 49
070 P011000 Y
070 P021000 Y
070 Q011000 N
070 Q021000 N
070 R011000 N
070 R021000 N
071 A001000 62623
071 B001000 7344
071 C001000 30020
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<PAGE> PAGE 50
074 E001000 0
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015 A001101 FIRST UNION NATIONAL BANK
015 B001101 C
015 C011101 PHILADELPHIA
015 C021101 PA
015 C031101 19106
015 E011101 X
024 001100 Y
025 A001101 DONALDSON LUFKIN & JENRETTE, INC.
025 B001101 13-2741729
025 C001101 D
025 D001101 347
025 A001102 LEHMAN BROTHERS HOLDINGS INC.
025 B001102 13-2518466
025 C001102 D
025 D001102 198
025 A001103 MORGAN STANLEY DEAN WITTER & CO.
025 B001103 13-2655998
025 C001103 D
025 D001103 381
025 A001104 SALOMON SMITH BARNEY HOLDINGS INC.
025 B001104 13-1912900
025 C001104 D
<PAGE> PAGE 51
025 D001104 355
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<PAGE> PAGE 52
048 C021100 0.000
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056 001100 N
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063 B001100 2.5
064 A001100 N
064 B001100 N
066 A001100 N
067 001100 N
068 A001100 N
068 B001100 N
069 001100 N
070 A011100 Y
070 A021100 Y
070 B011100 N
<PAGE> PAGE 53
070 B021100 N
070 C011100 Y
070 C021100 N
070 D011100 N
070 D021100 N
070 E011100 Y
070 E021100 Y
070 F011100 N
070 F021100 N
070 G011100 Y
070 G021100 N
070 H011100 N
070 H021100 N
070 I011100 N
070 I021100 N
070 J011100 Y
070 J021100 Y
070 K011100 Y
070 K021100 N
070 L011100 Y
070 L021100 Y
070 M011100 N
070 M021100 N
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 33878
071 B001100 6317
071 C001100 16090
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<PAGE> PAGE 54
072 O001100 0
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<PAGE> PAGE 55
074 X001100 2
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008 A001201 BARROW,HANLEY,MEWHINNEY & STRAUSS,INC.
008 B001201 A
008 C001201 801-14861
008 D011201 DALLAS
008 D021201 TX
008 D031201 75201
015 A001201 FIRST UNION NATIONAL BANK
015 B001201 C
015 C011201 PHILADELPHIA
015 C021201 PA
015 C031201 19106
015 E011201 X
024 001200 N
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045 001200 Y
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<PAGE> PAGE 56
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050 001200 N
051 001200 N
052 001200 N
053 A001200 N
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054 C001200 N
054 D001200 N
054 E001200 N
054 F001200 N
054 G001200 N
054 H001200 N
054 I001200 N
054 J001200 N
054 K001200 N
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<PAGE> PAGE 57
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<PAGE> PAGE 58
070 N021200 N
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070 R021200 N
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<PAGE> PAGE 59
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015 A001301 FIRST UNION NATIONAL BANK
015 B001301 C
015 C011301 PHILADELPHIA
015 C021301 PA
015 C031301 19106
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024 001300 N
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<PAGE> PAGE 60
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To the Shareholders and
Trustees of Vanguard Variable Insurance Fund
In planning and performing our audit of the financial statements
of Vanguard Variable Insurance Fund (the "Fund") for the year
ended September 30, 1999, we considered its internal control,
including control activities for safeguarding securities, in order
to determine our auditing procedures for the purpose of
expressing our opinion on the financial statements and to
comply with the requirements of Form N-SAR, not to
provide assurance on internal control.
The management of the Fund is responsible for
establishing and maintaining internal control. In
fulfilling this responsibility, estimates and judgments
by management are required to assess the expected benefits
and related costs of controls. Generally, controls that are
relevant to an audit pertain to the entity's objective of
preparing financial statements for external purposes
that are fairly presented in conformity with generally
accepted accounting principles. Those controls
include the safeguarding of assets against unauthorized
acquisition, use or disposition.
Because of inherent limitations in internal control, errors
or fraud may occur and not be detected. Also, projection
of any evaluation of internal control to future periods
is subject to the risk that it may become inadequate
because of changes in conditions or that the
effectiveness of the design and operation may deteriorate.
Our consideration of internal control would not necessarily
disclose all matters in internal control that might be
material weaknesses under standards established by
the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design
or operation of one or more of the internal control
components does not reduce to a relatively low level
the risk that misstatements caused by error or fraud
in amounts that would be material in relation to
the financial statements being audited may occur
and not be detected within a timely period by
employees in the normal course of performing their
assigned functions. However, we noted no matters
involving internal control and its operation,
including controls for safeguarding securities,
that we consider to be material weaknesses as defined
above as of September 30, 1999.
This report is intended solely for the information
and use of management and the Board of Trustees
of the Fund and the Securities and Exchange
Commission and is not intended to be and should not
be used by anyone other than these specified parties.
November 5, 1999
C:/My Documents/Vanguard/N-Sar/VVIF
C:\My Documents\Vanguard Funds 1999-2000\Vanguard September Funds\NSAR_VVIF.doc
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