DATUM INC

Q: Jun 30 2002

Q: Jun 30 2002

Q: Mar 31 2002

FY: Dec 31 2001

Q: Sep 30 2001

Q: Jun 30 2001

Q: Mar 31 2001

FY: Dec 31 2000

Q: Sep 30 2000

Q: Jun 30 2000

Q: Mar 31 2000

FY: Dec 31 1999

FY: Dec 31 1999

Q: Sep 30 1999

Q: Jun 30 1999

Q: Mar 31 1999

FY: Dec 31 1998

FY: Dec 31 1998

Q: Sep 30 1998

Q: Jun 30 1998

5,7

5,7

ITEM INFORMATION:

ITEM INFORMATION:

2,7

Current report pursuant to Section 13 or 15(d) (amendment)

Current report pursuant to Section 13 or 15(d)

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post-effective amendment to a registration statement

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Certification of termination of registration of a class of securities (Section 12(g))

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

STATE OF WISCONSIN INVESTMENT BOARD

STATE OF WISCONSIN INVESTMENT BOARD

STATE OF WISCONSIN INVESTMENT BOARD

STATE OF WISCONSIN INVESTMENT BOARD

STATE OF WISCONSIN INVESTMENT BOARD

DIMENSIONAL FUND ADVISORS INC

STATE OF WISCONSIN INVESTMENT BOARD

DIMENSIONAL FUND ADVISORS INC

STATE OF WISCONSIN INVESTMENT BOARD

FREQUENCY ELECTRONICS INC

FREQUENCY ELECTRONICS INC

FREQUENCY ELECTRONICS INC

DIMENSIONAL FUND ADVISORS INC

STATE OF WISCONSIN INVESTMENT BOARD

HORWITZ LOUIS B

DIMENSIONAL FUND ADVISORS INC

STATE OF WISCONSIN INVESTMENT BOARD

BALL CORP

BALL CORP

HORWITZ LOUIS B

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