| Acronym | Definition |
|---|
| RDA | Recommended Daily/Dietary Allowance |
| RDA | Redevelopment Agency (various locations) |
| RDA | Riding for the Disabled Association |
| RDA | Registered Dental Assistant |
| RDA | Regional Development Agency (UK) |
| RDA | Richard Dean Anderson (actor) |
| RDA | Regional Development Authority (various locations) |
| RDA | Regional Development Australia |
| RDA | Remote Data Access (Sprint) |
| RDA | Redevelopment Authority |
| RDA | Research, Development, & Acquisition |
| RDA | Rassemblement Democratique Africain (French: African Democratic Rally) |
| RDA | Resources Development Administration (Avatar) |
| RDA | Racial Discrimination Act (Australia) |
| RDA | Rural Development Administration (Korea) |
| RDA | Resource Description and Access |
| RDA | Recommended Daily Amounts (EU) |
| RDA | Road Development Authority |
| RDA | Remote Database Access (OSI) |
| RDA | République Démocratique Allemande (French: former Democratic Republic of Germany) |
| RDA | Radar Data Acquisition |
| RDA | Request for Determination of Applicability (universities) |
| RDA | Relationship Development Assessment |
| RDA | Regularized Discriminant Analysis |
| RDA | Readers Digest Association, Inc |
| RDA | Retail Display Allowance |
| RDA | Remote Diagnostic Agent |
| RDA | Research and Development Association (Republic of Korea) |
| RDA | Rajshahi Development Authority (Bangladesh) |
| RDA | Records Disposition Authorization |
| RDA | Right Displaced Abomasum |
| RDA | Research Development Associates |
| RDA | Regional Development Assistance (government funding) |
| RDA | Regional Director of Agencies (insurance) |
| RDA | Rainy Day Amendment (Oregon, USA) |
| RDA | Rear Drive Axle |
| RDA | River Deben Association (UK) |
| RDA | Relational Distributed Architecture |
| RDA | Reboul Delaye et Associés (French computing company) |
| RDA | Requirement Development Analysis |
| RDA | Research Development Activity |
| RDA | Reliability Design Analysis |
| RDA | Rapid Development Application (see also RDE) |
| RDA | Requirements Development & Analysis (JOPES module) |
| RDA | Reflective Dot Array |
| RDA | Routing Domain and Area (SONET) |
| RDA | Recommended Duty Assignment |
| RDA | Residential Subscriber System Data Adaptor |
| RDA | Recursive Decision Algorithm |
| RDA | Retro-Directive Antenna |
| RDA | Richiesta dell'Acquisto (Italian: Purchase Request) |
| RDA | Random Duplicate Allocation |
| RDA | Richard Daley Associates (UK) |
| RDA | Rational Data Architect (IBM Corp.) |
| RDA | Rapid Deployment for Action (band) |
| RDA | Reporting and Data Analysis |
| RDA | República Democrática Alemana (Spanish: German Democratic Republic) |