Consulting
- AT&T Information Systems (1987)
- Bell Laboratories (1976-78)
- Bull Worldwide Information Systems (1993)
- CableLabs, Inc. (1997-98)
- Colorado Department of Transportation (1993)
- Convex Computer Corporation (1994)
- Eastman Kodak Company (1989-91)
- Ford Aerospace Corporation (1988)
- Hewlett-Packard Corporation (1976)
- Interactive Systems Corporation (1986-93)
- Martin Marietta Corporation (1988)
- Microsoft Corporation (1998-2000, 2002)
- NASA-Langley, ICASE (1978)
- National Center for Atmospheric Research (1976)
- NCR (1992-93)
- Seybold Office Computing Group (1987-88)
- Storage Technology Corporation (1978, 1996)
- U. S. Department of Interior, BLM (1976)
- U. S. Department of Commerce, NBS (1977)
- Xerox Palo Alto Research Center (1977)
- Various
legal cases
for different law firms (1995-present)