| AFNOR | Association Francaise de Normalisation (France) |
| ANSI | American National Standards Institut (USA) |
| BSI | Britisch Standards Institution (UK) |
| CCIR | Consultative Committee on International Radio |
| CCITT | Comité Consultatif International Télégraphique et Téléphonique [ ] |
| CEPT | Conférence Européene des Administrations des Postes et des Télécommunications (Europe) |
| DIN | Deutsche Institut für Normung (Germany) |
| EIA | Electronic Industry Association |
| ETSI | European Telecommunication Standards Institute (Europe) |
| IEC | International Electrotechnical Commission [] |
| IEEE | Institute of Electrical and Electronics Engineers (USA) |
| ISO | International Standardization Organisation [] |
| ITU | International Telecommunication Union [] |
| JISC | Japanese Industrial Standards Committee (Japan) |
| NEN | Nederlands Normallisatie-Instituut (Netherlands) |
| NIST | National Institute of Standards (USA) |
| SNV | Schweizerische Normenvereinigung (Swiss) |
| TIA | Telecommunications Industry Association (USA) |
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