| Acronym | Meaning |
| COSAC | Conférence des Organes Spécialisés dans les Affaires Communautaires (French: Conference of Community and European Affairs Committees of the Parliaments of the European Union) |
| COSAC | Conferenza degli Organismi Specializzati Negli Affari Comunitari ed Europei dei Parlamenti dell'Unione Europea (Italian: Conference of Community and European Affairs Committees of the Parliaments of the European Union) |