(ISO (International Organization for Standardization
(IEC (International Electrotechnical Commission
(ITU (International Communication Union
(CEN (The Europeen Commitee for Standardization
(ETSI (European Telecommunications Standards Institute
(NIST (National Institute of Standards and Technology
(ANSI (American National Standards Institute
(BSI (British Standards Institution
(ASTM (American Society for testing and material
(AFNOR (Association Francaise de Normalization
(DIN (Deutsches Institut fur Normung e.V.