Utility Purchasing Management Group (UPMG)
http://www.upmg.com

Utility Supply Management Alliance (USMA)
http://www.usma.com

North American Association of Utility Distributors
http://www.naaud.com

Institute of Electrical and Electronics Engineers
http://www.ieee.org

National Assoc. of Electrical Dist. (NAED)
http://www.naed.org