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Exhibit 23 to 1999 Form 11-K
MPSI Systems Inc.
Matching Investment Plan
CONSENT OF INDEPENDENT AUDITORS
The Board of Directors
MPSI Systems Inc.:
We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 33-32503) pertaining to the MPSI Systems Inc. Matching Investment Plan
and in the related Prospectus of our report dated June 27, 2000, with respect to
the financial statements and supplemental schedules of the MPSI Systems Inc.
Matching Investment Plan included in this Annual Report (Form 11-K) for the year
ended December 31, 1999.
/s/ ERNST & YOUNG LLP
Tulsa, Oklahoma
June 27, 2000
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