Just some organizations which have sent personnel to DiSTI training courses:

AST, Inc.
Colsa Corporation
Cubic
DISA
E-Systems
Enzian Technology
E-OIR Measurements
Ericsson Microwave Systems
GEC Marconi
Hughes Training
IIT Research Institute
Industrial Data Link
Kongsberg
Lockheed-Martin
McDonnell Douglas
Mevatec Corporation
MITRE
Motorola
Nations, Inc.
Nichols Research Corp.
Northrup-Grumman
Raytheon
Reflectone, Inc.
Saab Military Aircraft
SAIC
Sikorsky Aircraft
Sparta
TASC
Texas Instruments
TRW
United Defense
VEDA Inc.

Jet Propulsion Laboratory
John Hopkins University
United States Military Acad.
University of Houston
Los Alamos Nat'l. Lab
Sandia National Laboratory
United States Air Force
Armstrong Labs
Rome Laboratory
Wright-Patterson AFB
Phillips Laboratory
United States Army
Aberdeen Proving Ground
CECOM
National Ground Intelligence
MICOM
Space & Strategic Defense
STRICOM
TACOM
White Sands Missile Range
U.S. Navy China Lake
NAVAIR
Naval Research Laboratory
Naval Surface Warfare Ctr.
Naval Undersea Warfare Ctr.

Austrailia
Canada
Germany
Israel
Japan
Norway
Saudi Arabia
Singapore
Slovakia
South Korea
Sweden
Taiwan
United Kingdom
United States of America