| APAC | Asia Pacific Laboratory Accreditation Cooperation | 
| APLMF | Asia-Pacific Legal Metrology Forum | 
| APMP | Asia Pacific Metrology Program | 
| BIML | International Bureau of Legal Metrology | 
| BIPM | International Bureau of Weights and Measures | 
| CAC-MAS-Q | Central Asian Cooperation on Metrology Accreditation and Quality | 
| CC | Certificate of Conformity | 
| CD | Committee Draft | 
| CGPM | General Conference on Weights and Measures | 
| CIPM | International Committee for Weights and Measures | 
| COOMET | Euro-Asian Cooperation of National Metrological Institutions | 
| CPR | Committee on Participation Review | 
| DD | Draft Document | 
| DoMC | Declaration of Mutual Confidence | 
| DR | Draft Recommendation | 
| EA | European Cooperation for Accreditation | 
| EMLMF | Euro-Mediterranean Legal Metrology Forum | 
| EUROMET | European Collaboration in Measurement Standards | 
| IAAC | Inter-American Accreditation Cooperation | 
| IAF | International Accreditation Forum | 
| IEC | International Electrotechnical Commission | 
| IFCC | International Federation of Clinical Chemistry | 
| ILAC | International Laboratory Accreditation Cooperation | 
| ISO | International Organization for Standardization | 
| IUPAP | International Union of Pure and Applied Physics | 
| MAA | Mutual Acceptance Agreement | 
| MLA | Multilateral Recognition Arrangements | 
| MRA | Mutual Recognition Arrangements | 
| NCWM | National Conference on Weights and Measures | 
| NIST | National Institute of Standards and Technology | 
| NMIs | National Metrology Institutes | 
| NTEP | National Type Evaluation Program | 
| OAS | Organization of American States | 
| OIML | International Organization of Legal Metrology | 
| PAC | Pacific Accreditation Cooperation | 
| PG | Project Group | 
| R | Recommendation | 
| RLAOs | Regional Laboratory Accreditation Organizations | 
| RLMOs | Regional Legal Metrology Organizations | 
| RMOs | Regional Metrology Organizations | 
| SADCA | Southern African Development Community in Accreditation | 
| SADCMET | Southern African Community Cooperation in Measurement Traceability | 
| SC | Technical Subcommittee | 
| SI | International System of Units | 
| SIM | Inter-American Metrology System | 
| SIM-LMWG | Inter-American Metrology System - Legal Metrology Working Group | 
| TC | Technical Committee | 
| UNIDO | United Nations Industrial Development Organization | 
| WD | Working Draft | 
| WELMEC | European Cooperation in Legal Metrology | 
| WTO | World Trade Organization |