| Acronym | Definition |
|---|
| RDDA | Regles pour la Description des Documents d' Archives (French: Canadian Committee on Archival Description) |
| RDDA | Red Dot Design Award |
| RDDA | Raleigh District Dietetic Association (North Carolina) |
| RDDA | Regional Digital Development Agency (UK) |
| RDDA | Research Develop Disseminate Adopt (education) |
| RDDA | Rationale Drug Design Approach |
| RDDA | Routing Digital Distribution Amplifier |
| RDDA | Recherche et Développement En Défense de l'Atlantique (French) |
| RDDA | Recherche et Développement Défense de l'Air |
| RDDA | Regional Defence Dental Association |
| RDDA | Rochester District Dietetic Association (New York) |
| RDDA | Receiver Decision Delayed ACK |