| Sigla | Nombre |
|---|---|
| OAGi | Open Applications Group, Inc. |
| OAS | Organization of American States |
| OASIS | Organization for the Advancement of Structured Information Standards (OASIS) |
| OASIS-PMRM | OASIS Privacy Management Reference Model |
| OCA | Open Charge Alliance |
| OCIMF | Oil Companies International Marine Forum |
| OECD | Organisation for Economic Co-operation and Development, OECD |
| OECD-NEA | OECD Nuclear Energy Agency (NEA) |
| OGC | Open Geospatial Consortium, Inc. |
| OGCI | Oil and Gas Climate Initiative |
| OGF | Open Grid Forum |
| OHCHR | Office Of The United Nations High Commissioner For Human Rights |
| OICA | International Organization of Motor Vehicle Manufacturers |
| OICCC | International Office of Cocoa, Chocolate and Sugar Confectionery |
| OIDF | The OpenID Foundation |
| OIF | Organisation internationale de la Francophonie |
| OIML | International Organization of Legal Metrology |
| OIPEEC | International Organization for the Study of the Endurance of Wire Ropes |
| OIV | International Organisation of Vine and Wine |
| OMG | Object Management Group |
| One Sea | One Sea |
| OPEI | The Outdoor Power Equipment Institute |
| OPEN Alliance Inc. | OPEN Alliance Inc. |
| Open Group | The Open Group |
| Opengroup, United Kingdom | Opengroup |
| OPF | Open Planets Foundation |
| OSGeo | Open Source Geospatial Foundation |
| OSJD | Organization for Co-operation between Railways |
| OSS | Sahara and Sahel Observatory |
| OTIF | Intergovernmental Organization for International Carriage by Rail |
- Participar
- Who develops standards
- Organizations in cooperation