| Rank | Abbreviation | Meaning |
|---|
| ***** | RDDA | Recherche et Développement En Défense de l'Atlantique
| |
| *** | RDDA | Rochester District Dietetic Association
| |
| *** | RDDA | Regional Defence Dental Association
| |
| *** | RDDA | Raleigh District Dietetic Association
| |
| *** | RDDA | Regular Demand Deposit Account
| |
| ** | RDDA | Red Dot Design Award
| |
| ** | RDDA | Recommended Daily Dietary Allowance
| |
| * | RDDA | Rationale Drug Design Approach
| |
| * | RDDA | Recherche et Développement Défense de l'Air
| |
| * | RDDA | Regles pour la Description des Documents d' Archives
| |
| * | RDDA | Research Develop Disseminate Adopt
| |
| * | RDDA | Regional Digital Development Agency
| |
| * | RDDA | RNA differential display assay
| |
| * | RDDA | Receiver Decision Delayed ACK
| |
| * | RDDA | Ritzville Downtown Development Association
| |
| * | RDDA | Research Development, Diffusion and Adoption
| |
| * | RDDA | Routing Digital Distribution Amplifier
| |
| * | RDDA | Retail Design and Development Awards
| |
| * | RDDA | Revenue Deficiency Deferral Account
| |
| * | RDDA | Roma Democratic Development Association
| |
| * | RDDA | Regional Developmental Disabilities Administrator
| |