| Acronym | Definition |
|---|
| DIRO➣Direction Interdépartementale des Routes Ouest (French: Interdepartmental Directorate of Roads West) |
| DIRO➣Departement d'Informatique et de Recherche Operationnelle |
| DIRO➣Director's Office (US DARPA) |
| DIRO➣District Industrial Relations Officer (now District Labor Relations Office) |