| FULL NAME | ACRONYM | COUNTRY |
| AEA Technology | AEA | United Kingdom |
| Arva Laboratorio de Analisis Industriales S.A. de C.V. | ALAI | Mexico |
| Austrian Research Centre, Seibersdorf | ARCS | Austria |
| Allied Signal | AS | United States |
| AMT fur Standardisierung, Messwesen und Warenprufung | ASMW | Germany |
| American Society for Testing and Materials | ASTM | United States |
| Alsimag Technical Ceramics | ATC | United States |
| Federal Institute for Materials Research and Testing | BAM | Germany |
| Bureau for Reference Materials | BCR | European Union |
| Bundesamt fur Eich- und Vermessungswesen | BEV | Austria |
| International Bureau of Weights and Measures | BIPM | International |
| Comite Consultatif pour la Quantite de Matiere | CCQM | International |
| Centro Espanol de Metrologia | CEM | Spain |
| European Committee for Standardization | CEN | Belgium |
| National Center for Metrology | CENAM | Mexico |
| Centro de Investigacion Cientifca de Yucatan | CICY | Mexico |
| Center for Measurement Standards | CMS | Taiwan |
| Czech Metrological Institute | CMI | Czech Republic |
| Centre National d'etudes des Telecommunications | CNET | France |
| Centre National de la Recherche Scientifique, Insitut de Chemie des Surface et Interfaces, Mulhouse Cedex | CNRS-ICSI-MC | France |
| Control Quimica/Novamann Int. | CQ/NI | Mexico |
| Ceramic Industrial Research Center | CRIBC | Belgium |
| Central Scientific Instruments Organization | CSIO | India |
| CSIR | CSIR | South Africa |
| Commonwealth Scientific and Industrial Research Organization | CSIRO | Australia |
| Ceskoslovensky Metrologicky Ustav (formally SMU) | CSMU | Slovakia and Czech Republics |
| Centro de Serviclos Quimicos | CSQ | Mexico |
| Centro de Servicios y Recursos Tecnologicos | CSRT | Mexico |
| Center for Technical Ceramics | CTK | The Netherlands |
| Czech Institute of Metrology | CVUTFEL | Czech Republic |
| Dow Chemical Company | DOW | United States |
| Danish Institute of Fundemental Metrology | DIFM | Denmark |
| Deutsches Institut fuer Normung | DIN | Germany |
| Denki Kagaku Kogyo Company | DKKC | Japan |
| Denki Kagaku Kogyo Kabashiki Kaisha | DKKKK | Japan |
| Other Federal de Metrologie | EAM | Switzerland |
| Insitute for Reference Materials and Measurements | IRMM | Belgium |
| Energy Research Foundation | ECN | The Netherlands |
| Federal Laboratories for Materials Testing and Research | EMPA | Switzerland |
| Ente Per Le nuove Technologie L'Energie E L'Ambiente | ENEA | Italy |
| Electrotechnical Laboratory | ETL | Japan |
| European Metrology Program | EUROMET | Europe |
| Maintainance Division, National Industries Corporation | FFV | Sweden |
| Fritz-Haber Institute | FHI | Germany |
| Fraunhofer Institut fur Silikatforschung | FIS | Germany |
| Feuerfest-Pruflabor | FPL | Germany |
| Fernmeldetechnisches Zentralamt | FTZ | Germany |
| Groupe de travail pour les grandeurs aux radiofrequences | GT-RF | International |
| Golden Technologies | GT | United States |
| Herm | H | Germany |
| H.C. Starch Gmbh | HCSG | Germany |
| Hakuto Inc. | HI | Japan |
| Imperial College for Science, Technology and Medicine | ICSTM | United Kingdom |
| Istituto Elettrotecnico Nazionale AGalileo Ferraris@ | IEN | Italy |
| IIRS | IIRS | Ireland |
| Istituto di Metrologia "G. Colonnetti" | IMGC | Italy |
| International Measurement Confederation | IMEKO | International |
| see VNIIM | IMM | Russia |
| Intema, S.A. de C.V. | IN | Mexico |
| Institute of Nuclear Energy Research | INER | Taiwan |
| Instituto Nacional de Engenharia e Technologia Ind. | INETI | Portugal |
| National Institute for Industrial Technology | INTI | Argentina |
| Institute for Optics | IO | Italy |
| Institute for Industrial Research | IRL | New Zealand |
| Institute of Materials Research | IMR | Slovakia Republic |
| Institut de Recherches des Telecommunications | IRT | Hungary |
| National Research Council Institute for Ceramics Technology | IRTEC | Italy |
| Institute for Surface Chemistry | ISC | Sweden |
| Bearing Institute | JBI | Japan |
| Japan Fine Ceramics Center | JFCC | Japan |
| Joint Institute for Laboratory Astrophysics | JILA | United States |
| Japan Quality Assurance Organization | JQA | Japan |
| Kyocera Corporation | KC | Japan |
| Kansai Electronic Industry Development Center | KEC | Japan |
| Kyoto Institute of Technology | KIT | Japan |
| Korean Research Institute of Standard Sciences | KRISS | Korea |
| Katholieke University Leuven | KUL | Belgium |
| Kochi Women's University | KWU | Japan |
| Laboratorio Central De Control De La Calidad Del Agua | LCCCA | Mexico |
| Laboratorie Central des Industries Electriques | LCIE | France |
| Laboratorio De Ecologia Industrial S.A. de C.V. | LDI | Mexico |
| Laboratorio Especalizado e Ingenieria Ambiental S.A. de C.V. | LEIA | Mexico |
| Laboratorio del Grupo Microanalisis | LGM | Mexico |
| Laboratoire National DeEssais | LNE | France |
| Laboratorio Nacional de Engenharia e Technologia Industrial | LNETI | Portugal |
| Laboratoire Primaire des Rayonnements Ionisants | LPRI | France |
| Laboratorio Quimica Industrial | LQI | Mexico |
| Laboratorio de Quim. de Medio E Industrial | LQMI | Mexico |
| MERKE | MERKE | Germany |
| Institut de Metrologie D.I. Mendeleev (aka IMM) | MIM | Russia |
| Materialprüfungsamt | MPA | Germany |
| Materialprüfungsamt Nordrhein-Westfalen | MPA-NRW | Germany |
| Michigan State University | MSU | United States |
| Materials Testing Office | MTO | Germany |
| National Aerospace Laboratory/Kakuda Research Center | NAL | Japan |
| National Engineering Laboratory | NEL | United Kingdom |
| NGK Spark Plug Co | NGK/SP | Japan |
| NGK Insulators | NGK/I | Japan |
| National Institute of Metrology | NIM | China |
| National Institute of Materials and Chemical Research | NIMCR | Japan |
| National Industrial Research Institute of Nagoya | NIRI | Japan |
| National Institute for Research in Inorganic Materials | NIRIM | Japan |
| National Industrial Research Laboratory | NIRL | Japan |
| National Institute of Standards | NIS | Egypt |
| National Institute of Standards and Technology | NIST | United States |
| Nederlands Meetinstituut | NMi | The Netherlands |
| National Metrology Laboratory | NML | South Africa |
| National Measurement Laboratory | NML | Australia |
| National Measurement Service | NMS | Norway |
| North American Metrology Program | NORAMET | North America |
| National Physical Laboratory | NPL | India |
| National Physcial Laboratory | NPL | Israel |
| National Physical Laboratory | NPL | United Kingdom |
| National Research Council | NRC | Canada |
| National Research Institute for Metals | NRIM | Japan |
| Naval Research Laboratory | NRL | United States |
| National Research Laboratory of Metrology | NRLM | Japan |
| NSK-RHP European Technology Centre | NSK-RHP | United Kingdom |
| Nippon Telegraph and Telephone Company | NTT | Japan |
| Office Federal de Metrologie | OFM | Switzerland |
| Office Federal de Metrologie/Eidgenossisches Amt fur Messwesen | OFMET | Switzerland |
| Osterreichisches Forschungszentrum | OFS | Austria |
| Orszagos Meresugyi Hivatal | OMH | Hungary |
| Osaka National Research Institute | ONRI | Japan |
| Polski Komitet Normalizaci | PKN | Poland |
| Physikalisch-Technische Bundesanstalt | PTB | Germany |
| Telelutkimuslaitos (TTL) was PTF | PTF | Finland |
| Quality Engineering Test Establishment | QETE | Canada |
| Robert Bosch | RB | Germany |
| Rogaland Research | RF | Norway |
| Rigaku Industrial Corporation | RIC | Japan |
| Institut de Recherches de la Defense | RIND | Sweden |
| Riso National Laboratory | RISO | Denmark |
| Royal Signals and Radar Establishment | RSRE | United Kingdom |
| Swedish Ceramic Institute | SCI | Sweden |
| Standards and Calibration Laboratory | SCL | Hong Kong |
| Showa Denko K.K. | SDKK | Japan |
| Sumitomo Electric Industries | SEI | Japan |
| Service Electrical Standards Centre (formally EQD) | SESC | United Kingdom |
| St. Gobain/Norton Industrial Ceramics Corporation | SG/NICC | United States |
| Standards and Industrial Research Institute | SIRI | Malaysia |
| Service Metrologie Belge | SMB | Belgium |
| Ceskoslovensky Metrologicky Ustav (now CSMU) | SMU | Slovakia and Czech Republics |
| Institut de Recherche Scientifique Siberien en Metrologie | SNIIM | Russia |
| Statens Provingsanstalt | SP | Sweden |
| Toshiba Corporation | TC | Japan |
| Toyota Central R&D Laboratory | TCRDL | Japan |
| Technische Hochschule Darmstadt | THD | Germany |
| Toshiba Research and Development Center | TRD | Japan |
| TRI/Princeton | TRI/Princeton | United States |
| Test Systems Environmental Analysis (MERKE) | TSEA | Germany |
| Technical University of Denmark | TUD | Denmark |
| UBE Industries | UBE | Japan |
| University of Connecticut | UCONN | United States |
| University of Kaiserslautern | UKAIS | Germany |
| University of Manchester | UMAN | United Kingdom |
| University of Sheffield | USHEF | United Kingdom |
| University of Tokyo | UTOKYO | Japan |
| University of Wyoming | UWY | United States |
| Universidad Autonoma Metropolotana Azcapotzalco | UAMA | Mexico |
| University of Manchester Institute of Science and Technology | UMIST | India |
| Universidad Nacional Autonoma de Mexico | UNAM | Mexico |
| Union radioscientific internationale | URSI | International |
| University of Twente | UT | The Netherlands |
| University of Wurtzburg | UW | Germany |
| Versailles Project on Advanced Materials and Standards | VAMAS | International |
| VAW aluminum AG | VAW AG | Germany |
| Institut de Mesures Physicotechniques et Radiotechniques | VNIIFTRI | Russia |
| D.I. Mendeleyev Institute for Metrology | VNIIM | Russia |
| NMI-Van Swinden Laboratory | VSL | The Netherlands |
| Weitzman Institute of Technology | WIS | Israel |
| W. R. Grace & Company | WRG | United States |
| Flemish Institute for Technological Research | VITO | Belgium |