Air Liquide America Corp.

Israel Aircraft

Armko Industries, Inc.

John Soules Foods

Anschutz Corp.

Kelco, Inc.

Beech Aircraft Corp.

Kerr McGee Corp.

Big Three Industries

Kirby Petroleum  Exploration

Central & Southwest Service Co.

Larco Mining & Metal of Larymna

CHA Industries

Marathon Battery

Crosby Group Laboratories

Mitsubishi Aircraft

CMD Realty Investors

Natkin Services

CMI Corporation

New Century Energies

Dolese Brothers Concrete

Perot Systems

Doyon Drilling

Petroleum Resources

Duncan Properties

Pride Oilfield Services

Eby Construction Corp.

Public Service Co. of Oklahoma

Exxon Corporation

Schlumberger Well Service

Farmland Industries

Southwestern Bell

Gates LearJet Corp.

Stingray Construction

General Motors Corp.

Tracor Aerospace

General Motors Assembly

Tri-Stem Engineering

Gulfstream Aerospace Corp.

Ward North America

Hardees

Westinghouse Corp.

Hertz Corp.

Will Rogers Airport Authority

Xerox Corp.