| Sigle | Nom |
|---|---|
| A-PBA | Asia-Pacific Biosafety Association |
| AAA | Asian Apicultural Association |
| AAC | Aluminium Anodizers Council |
| AACEi | AACE International |
| AATCC | American Association of Textile Chemists and Colorists |
| AAUS | American Academy of Underwater Sciences |
| ABC4Trust | ABC4Trust - Attribute-based Credentials for Trust |
| ABSA | American Biological Safety Association |
| ABU | Asia-Pacific Broadcasting Union |
| ACCA | Association of Chartered Certified Accountants |
| ACCT | Association for Challenge Course Technology |
| ACI | Airport Council International |
| ACi_ | Association of Corporate Investigators |
| ACM SIGPLAN-HILT | Association for Computing Machinery's Special Interest Group on Ada |
| ACTUS | Financial Research Foundation, Inc. |
| Ada-Europe | Ada-Europe |
| ADBank | Asian Development Bank |
| ADRC | Asian Disaster Reduction Center |
| AEA_Ammonia Energy Association | Ammonia Energy Association |
| AEF | Agricultural Industry Electronics Foundation |
| AEM | World Manufacturer Code - AEM | Association of Equipment Manufacturers |
| AEQ | Association Euro-Qualiflex |
| Aerospace & Defense PLM Action Group | Aerospace & Defense PLM Action Group |
| AES | Audio Engineering Society |
| AFACT | Asia Pacific Council for Trade Facilitation and Electronic Business |
| AFCA | Asian Financial Cooperation Association |
| AFECOR | Association Européenne des fabricants d'appareils de commande et de régulation |
| AFPC | Advanced Function Presentation Consortium |
| African EF | AEF |
| AfWA | Association Africaine de l'eau |
| AgGateway | AgGateway |
| AGICOA | Association de gestion internationale collective des oeuvres audiovisuelles |
| AIB_Association of Issuing Bodies | Association of Issuing Bodies ivzw |
| AIDIS | Inter-American Association of Sanitary and Environmental Engineering |
| AIHA | American Industrial Hygiene Association |
| AIIC | Association Internationale des Interprètes de Conférence |
| AILA | Association internationale de linguistique appliquée |
| AIM Global | Association for Automatic Identification and Mobility |
| AIMF | Association Internationale des Maires Francophones |
| AIPC | International Association of Convention Centres |
| AISE | Association internationale de la savonnerie, de la détergence et des produits d'entretien |
| AIT | Alliance internationale de tourisme |
| AIToxicologists | Association of Inhalation Toxicologists |
| AKMS | Arab Knowledge Management Society |
| AMCA | AMCA International Inc. |
| AMPP | Association for Materials Protection and Performance |
| ANEC | The European consumer voice in standardisation |
| ANF HQ | Thailand Science Park Project |
| ANNA | Association of National Numbering Agencies |
| ANRRC | Asian Network of Research Resource Centers |
| AOAC INTERNATIONAL | AOAC INTERNATIONAL, Association of Analytical Communities |
| AOCS | American Oil Chemists' Society |
| APAC | Asia Pacific Accreditation Cooperation Incorporated (APAC) |
| APDS | Alliance for Parking Data Standards Ltd. |
| APEC | Asia Pacific Economic Cooperation |
| APF | Fédération asiatique de l'emballage |
| APIMONDIA | International Federation of Beekeepers’ Associations |
| APO | Organisation asiatique de productivité |
| APPLiA | Home Appliance Europe |
| AQUATIL | aquatil gGmbh |
| ARC/IPRG | Apiceutical Research Centre / International Propolis Research Group |
| AREA | Augmented Reality for Enterprise Alliance |
| ARGE | Fédération européenne des associations de fabricants de serrures et de ferrures |
| ARIA | Americas Research Industry Alliance |
| ASAM | Association for Standardisation of Automation and Measuring Systems (ASAM e.V.) |
| ASD-STAN | AeroSpace and Defence Industries Association of Europe - Standardization |
| ASEAN Cosmetics Association | ASEAN Cosmetic Association (ACA) |
| ASEF | Active Shipbuilding Experts' Federation |
| ASI | Aluminium Stewardship Initiative |
| ASIC | Association scientifique internationale du café - ASIC |
| ASIS | ASIS International |
| ASLM | African Society for Laboratory Medicine |
| ASM International | ASM International |
| ASQ | American Society for Quality |
| ASTM | ASTM International |
| ATIBT | Association technique internationale des bois tropicaux |
| ATIS | Alliance for Telecommunications Industry Solutions |
| ATPA | Asia Toy and Play Association Limited |
| ATSC | The Advanced Television System Committee |
| ATTA | Adventure Travel Trade Association |
| AUF | Agence Universitaire de la Francophonie |
| Avicenna Alliance | Avicenna Alliance |
| AVS | Audio Video Coding Standard Workgroup of China |
| AWDC | Antwerp World Diamond Centre |
| AYICC | The African Youth Initiative for Climate Change |
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