| Abbreviation | Definition |
|---|---|
| RECI | Registered Electrical Contractors of Ireland |
| REFB | Redwood Empire Food Bank |
| REHVA | Representatives of European Heating and Ventilating Associations |
| REINSW | Real Estate Institute of New South Wales |
| REME | Royal Electrical and Mechanical Engineers |
| RENEW | Restoring the Environment and Neutralising the Effects of the War |
| REPCO | Rural Energy Producers Electric Power Cooperative |
| REPL | Retail Enterprise People Logistics |
| RESAP | Rural Electric Safety Achievement Program |
| RESNA | Rehabilitation Engineering Society of North America |
| RETD | Renewable Energy Technology Deployment |
| RFCI | Resilient Floor Covering Institute |
| RGD | Association of Registered Graphic Designers of Ontario |
| RGN | Retired Guys Network of Kansas City |
| RGS | Royal Geographic Society |
| RGS | Royal Geographical Society |
| RHA | Road Haulage Association |
| RHBA | Raleigh Hills Business Association |
| RHBA | Rochester Hispanic Business Association |
| RHRA | Rochester Human Resources Association |