| ALCOA (2) |
Military Operations Research Society (MORS) (5) |
| AlliedSignal |
Missile Defense Agency |
| AMP (4) |
MITRE (2) |
| A.O. Smith |
Motorola |
| AT&T |
Nabisco |
| AT&T – Saudi Arabia (2) |
NASA |
| Babcock & Wilcox Y-12 (Oak Ridge National Lab) |
National Geospatial-Intelligence Agency |
| Bell Labs (5) |
National Institute of Standards and Technology (NIST) |
| BHP |
National Security Agency (5) |
| Boeing (5) |
NATO – Netherlands |
| Caterpillar (2) |
NCR |
| Center for Naval Analyses (2) |
Nortel Networks (2) |
| Central and South West Services |
Northrop Grumman |
| Coca-Cola |
Ore-Ida Foods |
| Colorado Technical University |
PROMODEL Corporation |
| CSX |
Raytheon |
| Department of National Defence – Canada |
Rockwell (2) |
| Dresser |
Sandia National Labs (2) |
| FEDSIM |
Sasol Technology – South Africa (4) |
| Flexsim Software Products |
Savannah River Site (Dept. of Energy) |
| General Electric |
SEMATECH (6) |
| General Motors (6) |
Singapore Institute of Mfg. Tech. – Singapore (2) |
| Harris Corporation |
Sintec – Mexico |
| Hewlett-Packard |
Society of Manufacturing Engineers (SME) (7) |
| IBM (5) |
Sparta, Inc. |
| IBM – Belgium |
Systems, Computers & Information – Brazil |
| Incontrol Enterprise Dynamics – Netherlands |
3M (2) |
| INFORMS (5) |
Tampere University of Technology – Finland |
| Institute of Industrial Engineers (IIE) (22) |
Time Warner |
| Intel |
United Space Alliance (2) |
| International Council on Systems Eng. (INCOSE) |
Universidad del Bio-Bio – Chile |
| International Society for Optical Eng. (SPIE) (3) |
University of Arizona (3) |
| International Test & Evaluation Assoc. (ITEA) (5) |
University of Chile – Chile |
| Intuit |
UPS |
| Joint Warfare Analysis Center (2) |
U.S. Air Force (24) |
| Kimberly-Clark |
U.S. Army (37) |
| Korean Simulation Society – Korea |
U.S. Forces Korea – Korea |
| Lockheed Martin (10) |
U.S. Navy (13) |
| Logistics Management Institute |
Verizon |
| Loral Space and Communications |
Whirlpool (3) |
| Los Alamos National Lab (2) |
WM-data Consult – Finland |
| M&M/Mars |
Xerox (2) |
| Manugistics |
|