• AGL Resources
• Alliant Energy
• Allegheny Power
• Alabama Power
• Anaheim Public Utilities Department (CA)
• Arizona Public Service (APS)
• Aspen/Pitken County (CO)
• Atos Origin
• Baldwin County (AL)
• Baltimore Gas & Electric (BG&E)
• BC Transmission/BC Hydro
• Boston (MA)
• Burbank Water and Power (CA)
• Cabarrus County (NC)
• Castle Rock (CO)
• Charlotte (NC)
• Charlotte/Mecklenburg (NC) Police Department
• CLECO
• Colorado Springs Utilities
• Columbia Power & Water Systems (TN)
• ConEdison
• CPFL (Brazil)
• CPS Energy (San Antonio)
• DOE/National Energy Technology Lab
• Duke Energy - formerly CINergy
• E.ON
• eMeter
• Enbridge Natural Gas (Ontario)
• ENMAX
• Entergy
• EPCOR
• ESRI
• Exelon
• Federal Transit Administration
• FirstEnergy
• Florida Power & Light (FPL)
• Gastonia (NC)
• General Electric
• Georgia Power Company
• Gold Fields Exploration
• Hawaiian Electric Company
• High Point (NC)
• Honeywell
• Hydro One (Ontario)
• IBM
• Independent Electricity System Operator
(IESO), Ontario
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• Itron
• JEA
• Laclede Gas Company
• LADWP
• Landis+Gyr - formerly Cellnet
• Level 3 Communications
• LG&E Energy
• Monroe (NC)
• Navopache Electric Co-op
• Neptune Technology Group
• Nicor Gas
• Northern Indiana Public Service Company (NIPSCO)
• NSTAR
• Northeast Utilities
• NV Energy
• Oncor (TXU) Electric Delivery
• Orange County (FL)
• Pacific Gas & Electric (PG&E)
• Pasadena (CA)
• Pepco Holdings, Inc.
• Piedmont Natural Gas
• Port of Portland
• Portland General Electric
• Quanta Technologies
• Raleigh (NC)
• Rappahannock Electric Cooperative
• Salt River Project
• San Antonio Water System (SAWS)
• San Diego Gas & Electric (SDG&E)
• SaskPower
• Sensus
• Shenandoah Valley Electric Cooperative
• South Carolina Electric & Gas
• South Jersey Gas
• Southern California Gas Company
• Southern Company
• Southern Maryland Electric Coop (SMECO)
• Salt River Project
• Tacoma Water, WA
• Tallahassee (FL)
• Technology Edge
• Telvent Miner & Miner
• Time Warner Cable
• Transit Cooperative Research
• Trilliant
• Tri-State G&T
• Union Gas
• United Illuminating Company
• Vattenfall (Finland)
• WE Energies
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