Here is a partial list of companies that have sent employees to classes taught by OCI instructors.

North America
A G Edwards Anheuser Busch Automated Trading Desk Amdocs Boeing Bridgestone/Firestone British Aerospace Systems BBN Blue Cross Blue Shield Cisco CopperCom EDS Edward Jones Express Scripts	Experian FirstLogic General Dynamics Harris Corporation Hewlett Packard InfoGlide Input-Output ITG ITT LiquidLight Lockheed Martin Lucent L3 Communications Mitel Motorola NASA (JPL, Ames, KSC)	Northrop Grumman Qualcomm Raytheon Sandia Labs Sensis Corporation Siemens Southwestern Bell Sylantro Thales Tripos US Air Force US Navy Veritas Software  3Com
Europe
Aselsan BBC Ericsson Hahn Meiner Institute Havelsan  Homag	Krones KSU Meco NEC	NDC Schott Rohr-Glas Siemens Tecnomen
Asia
Philcomm Invensys	Toshiba	Optus