American National Standards Committee (ANSI), 1420 Broadway, Ney York, NY 10018, USA.

Electronic Industries Association (EIA), 2001 I Street NW, Washington, DC 20006, USA.

Institute of Electrical and Electronic Engineers (IEEE), 345 East 47th St., New York, NY 10017, USA.

Instrument Society of America (ISA), 67 Alexander Drive, Research Triangle Park, NC 27709, USA.

International Standards Organization (ISO), 1430 Broadway, New York, NY 10018, USA.

National Electrical Manufacturers Association (NEMA), 2101 L. Street NW, Washington, DC 20037, USA.

Society of Manufacturing Engineers (SME), PO Box 930, One SME Drive, Dearborn, MI 48121, USA.