| ecss.nl | European Cooperation on Space Standardization (ECSS) |
| iaea.or.at | International Atomic Energy Agency |
| euromedtransport.org | EuroMed Transport Project |
| itu.int | Itu Radiocommunication Sector |
| corm.org | Council for Optical Radiation Measurements (CORM) |
| copant.org | Pan American Standards Commission (COPANT) |
| cenelec.org | European Committee for Electrotechnical Standardization (CENELEC) |
| ccsds.org | Consultative Committee for Space Data Systems (CCSDS) |
| sfcgonline.org | Space Frequency Coordination Group (SFCG) |
| netaworld.org | InterNational Electrical Testing Association (NETA) |
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