| English | Spanish |
| African Union Summit | Cumbre de la Unión Africana |
| Asian Subregional Workers' Education Seminar on the Promotion of Women's Participation in Trade Union Work in Selected Industries and Trades | Seminario subregional asiático de educación obrera sobre el fomento de la participación de la mujer en la labor sindical en industrias y oficios seleccionados |
| Catholic International Union for Social Service | UCISS |
| Credit Union Investment Committee | Comité de Inversiones de la Cooperativa de Crédito |
| Credit Union's on-line integrated computer system | Sistema integrado en línea de la Cooperativa de Crédito |
| Credit Union's on-line integrated computer system | CUSYS |
| Economic and Monetary Union of West Africa | Unión Económica y Monetaria del África Occidental |
| European Union of Potato Processing Industry | Unión Europea de las Industrias de Transformación de la Patata |
| International Union for Conservation of Nature | Unión Internacional para la Conservación de la Naturaleza y de los Recursos Naturales |
| International Union for Conservation of Nature | UICN |
| International Union for Conservation of Nature and Natural Resources | Unión Internacional para la Conservación de la Naturaleza y de los Recursos Naturales |
| International Union for Conservation of Nature and Natural Resources | UICN |
| International Union for Cooperation Towards Development | UNICOS |
| International Union for the Protection of New Varieties of Plants | UPOV |
| International Union of Biological Sciences | UICB |
| International Union of Family Organizations | Unión Internacional de Organismos Familiares |
| International Union of Family Organizations | UIOF |
| International Union of Food, Agricultural, Hotel, Restaurant, Catering, Tobacco and Allied Workers Associations | Unión Internacional de Trabajadores de la Alimentación, Agrícolas, Hoteles, Restaurantes, Tabaco y Afines |
| International Union of Food, Drink and Tobacco Workers' Association | Unión Internacional de Asociaciones de Trabajadores de los Ramos de Alimentación, Bebidas y Tabacos |
| International Union of Food, Drink and Tobacco Workers' Association | UITABT |
| International Union of Forest Research Organizations | Unión Internacional de Organizaciones de Investigación Forestal |
| International Union of Forest Research Organizations | IUFRO |
| International Union of Geodesy and Geophysics | UIGG |
| International Union of Geological Sciences | UIGG |
| International Union of Nutritional Sciences | Unión Internacional de Ciencias de la Nutrición |
| International Union of Nutritional Sciences | IUNS |
| International Union of Pure and Applied Chemistry | UIQPA |
| International Union of Pure and Applied Physics | UIPPA |
| International Union of Soil Sciences | Unión Internacional de la Ciencia del Suelo |
| Liaison Bureau of the European EEC Union of Aromatic Products | Oficina de Relaciones de la Unión Europea EEC de Productos Aromáticos |
| National Credit Union Administration of the United States | Administración Nacional de Cooperativas de Crédito de los Estados Unidos |
| Regional Trade Union Workshop on Occupational Safety and Health Training Materials for English-speaking African Countries | Curso práctico regional sindical sobre material docente para seguridad y salud en el trabajo para países africanos de lengua inglesa |
| South-East Asian Workers' Education Course on Trade Union Policies and Action for Women | Curso de educación obrera para Asia sudoriental sobre políticas y acción sindical en favor de la mujer |
| Union of Arab Universities | Unión de Universidades Árabes |
| Union of Banana Exporting Countries | UPEB |
| World Union of Catholic Women's Organizations | UMOFC |
