· Aliant Inc
· Amtrak
· Atlanta Gas Light Company
· Bashkent University Hospital, Ankara, Turkey
· B.C. Hydro
· Bell Mobility
· Bently Nevada
· Bermuda Telephone Company
· Boeing Commercial Airplane  
· Bombardier Transportation & Aerospace
· Brascan Corporation
· City of Thunder Bay
· City of Victoria
· Cox Communications
· Cornell University
· Princeton University
· University of Houston
· University of South Carolina
· General Electric Canada
· Great Lakes Hydro America, LLC
· Greater Toronto Airports Authority
· Halliburton Energy Services
· Idaho Power
· JDS Uniphase Corp.
· LeTourneau University, Texas
· Lockheed Martin Information Systems
· MTS Allstream Inc
· Manitoba Hydro.
· Minnesota Power
· NASA - Kennedy Space Center
· Sprint Canada
· State of Minnesota
· Titan Unidyne Corporation
· Torbram Electric Supply
· Toronto Hydro Telecom Incorporated
· Toronto Transit Commission
· Turner Broadcasting Systems Inc.
· Union Pacific Railroad Company
· Union Telephone Company
· US Army BlackHawk Management Corporation
· US Army Corp. of Engineers 
· US Coast Guard
· US Navy Strategic Weapons Facility
· Wisconsin & Southern Railroad Co.