| RD&A | Research, Development and Acquisition 
| Others |
| RDA | A Required Daily Allowance
| Others |
| RDA | Racial Discrimination Act
| Others |
| RDA | Racing Drivers Association
| Others |
| RDA | Radar Data Aquisition
| Others |
| RDA | Radioactive Dentine Abrasion
| Others |
| RDA | Rally Drivers Association
| Others |
| RDA | Rallye Des Alpes
| Others |
| RDA | Random Arrest
| Others |
| RDA | Range Dangerous Aria
| Others |
| RDA | Range Duration And Area
| Others |
| RDA | Rapid Deployment for Action
| Others |
| RDA | Rare Disease Act Act of 2002, P.L. 107-280
| Others |
| RDA | Rational Data Architect
| Others |
| RDA | Rawalpindi Development Authority
| Others |
| RDA | Re Development Agency
| Others |
| RDA | Reader's Digest Association
| Others |
| RDA | Reading Drives Achievement
| Others |
| RDA | Real Diaper Association
| Others |
| RDA | Rear Door Alert
| Others |
| RDA | Rear Drive Assembly
| Others |
| RDA | Rear Drive Axle
| Others |
| RDA | Rebuildable Dripping Atomizer
| Others |
| RDA | Rebuildable Dripping Atomizers
| Others |
| RDA | Recently Detoxified Alcoholic
| Others |
| RDA | Recommended Daily Allowance
| Others |
| RDA | Recommended Daily Amount
| Others |
| RDA | Recommended Daily Amounts
| Others |
| RDA | Recommended Dietary Allowance
| Others |
| RDA | Recommended Dietary Allowances
| Others |
| RDA | Recommended Dietary Amount
| Others |
| RDA | Records Disposition Authorization
| Others |
| RDA | Red Dragon Alliance
| Others |
| RDA | Refuse Disposal Arena
| Others |
| RDA | Refuse to Disclose Answer
| Others |
| RDA | Regional Dance America
| Others |
| RDA | Regional Delegate Alternate
| Others |
| RDA | Regional Development Agency
| Others |
| RDA | Regional Development Agency (all abolished in England on 31 March 2012)
| Others |
| RDA | Regional Development Authority
| Others |
| RDA | Regional Director of Agencies
| Others |
| RDA | Registered Dental Assistant
| Others |
| RDA | Registration Details Application
| Others |
| RDA | Reglamento Deportivo Automovilistico
| Others |
| RDA | Relationship Development Assessment
| Others |
| RDA | Remote Data Access
| Others |
| RDA | Remote Data Acquisition
| Others |
| RDA | Remote Database Access
| Others |
| RDA | Remote Debug Agent
| Others |
| RDA | Renault Design Award
| Others |
| RDA | Renewable Developers Administration
| Others |
| RDA | Representational Difference Analysis
| Others |
| RDA | Republican Dads of America
| Others |
| RDA | Required Dietary Allowance
| Others |
| RDA | Research and Data Analysis
| Others |
| RDA | Research and Development Agreement
| Others |
| RDA | Research Data Alliance
| Others |
| RDA | Research Data Archive
| Others |
| RDA | Research Deployment and Accountability
| Others |
| RDA | Research, Development, and Acquisition
| Others |
| RDA | Residence Dining Account
| Others |
| RDA | Resident Data Area
| Others |
| RDA | Resource Description & Access
| Others |
| RDA | Resource Description Access
| Others |
| RDA | Resource Description and Access
| Others |
| RDA | Resource Development Associates
| Others |
| RDA | Resources Development Administration
| Others |
| RDA | Results Driven Accountability
| Others |
| RDA | Retail Display Allowance
| Others |
| RDA | Rheinmetall Defence Australia
| Others |
| RDA | Rice Design Alliance
| Others |
| RDA | Rich Demanding Albatross
| Others |
| RDA | Richard Dean Anderson
| Others |
| RDA | Riders Driving Around
| Others |
| RDA | Riding For Disabled Association
| Others |
| RDA | Riding for the Disabled Association
| Others |
| RDA | Road Development Authority
| Others |
| RDA | Rochester Downtown Alliance
| Others |
| RDA | Rockhampton Downs, Northern Territory, Australia
| Others |
| RDA | Rockville Downtown Association
| Others |
| RDA | Rules Don't Apply
| Others |
| RDA | Rural Development Area
| Others |