| Abbreviation | Definition |
|---|---|
| RRCB | Registration Recognition and Certification Board |
| RREC | Residential Real Estate Committee |
| RSA | Riverside Sheriffs' Association |
| RSAA | Royal Society for Asian Affairs |
| RSBE | Richmond Society of Broadcast Engineers |
| RSC | Royal Society of Chemistry |
| RSL | Radiological Society of Louisiana |
| RSM | Regional Security Manager |
| RSNA | Radiological Society of North America |
| RSPS | Russian Union of Juice Producers |
| RTA | Radix Teachers Association |
| RTAA | Home Roof Tile Association of Australia |
| RTAA | Refrigeration Trade Association of America |
| RTAC | Retired Teachers Association of Chicago |
| RTAC | Roads and Transportation Association of Canada |
| RTAE | Rubber Trade Association of Europe |
| RTAI | Religion Teachers' Association of Ireland |
| RTAJ | Route Taxi Association of Jamaica |
| RTDA | Retail Tobacco Dealers of America |
| RTNDA | Radio-Television News Directors Association |