Pritsker & Associates, P.O. Box 2413, West. Lafayette, IN ;Software Services Corporations, 1260 Eisenhower Place, Ann Arbor, MI;NCR Corporation, SER Building, 1700 South Patterson Road, Dayton, OH;Applied Systems Modeling, Ltd., P.O. Box 1239, Anderson, IN;Mannesmann Demag Corporation, 2660 28th Street, S.E., Grand Rapids, MI;Wolverine Software Corporation, 7630 Little River Turnpike, Suite 208, Annandale, VA