| Abbreviation | Definition |
|---|---|
| RDBS | Reading and District Bantam Society |
| RDCS | Reading Deaf Children's Society |
| RDRPS | Royal Deeside Railway Preservation Society |
| RDSS | Rare Disorders Society Singapore |
| RDSS | Rochester Data Science Society |
| RDWS | Rural Development Welfare Society |
| RES | Royal Economic Society |
| RES | Royal Entomological Society |
| RESEARCH | Renewable Energy Society for Education Awareness Research Community Help |
| RESI | Research Ethics and Society Initiative |
| REVS | Researching the Evolution of Vehicles in Society |
| RFHS | Rotherham Family History Society |
| RFPG | Royal Faculty of Procurators in Glasgow |
| RFS | Royal Forestry Society of England, Wales and Northern Ireland |
| RGS | Royal Gay Society |
| RGSC | Royal Geological Society of Cornwall |
| RHASS | Royal Highland Agricultural Society of Scotland |
| RHCS | Riverview Horticultural Centre Society |
| RHIS | Redlands Horticultural and Improvement Society |
| RHRS | Russian Hair Research Society |