U.S. Army
U.S. Navy
U.S. Air Force
U.S. Marines
State of California,
Division of Forestry, U.S. Dept. of Agriculture,
Dow Chemical Co., Midland, MI
Motorola, Schaumberg, IL
OMS, Inc.
Ballistic Missile Early Warning Site, Clear, Alaska
IBM, Manassas, VA
Northrop Worldwide Aircraft Services, Enid, OK
Federal Reserve Bank, Kansas City, MO
New York Fire Department, New York, NY
NASA (National Aeronautics and Space Administration), Cleveland, OH
Michigan Air National Guard
Wisconsin Air National Guard
Ohio Air National Guard
FBI, Washington, D.C.
DEA, Washington, D.C.
Federal Aviation Agency, Washington, D.C.
U.S. Bureau of Land Management, Various Locations
U.S. Coast Guard, Various Locations
University Hospital, Albuquerque, NM

And many more …..