| Abbreviation | Definition |
|---|---|
| RAS | Rossijskaâ Akademiâ Nauk |
| RAS | Royal Agricultural Society of New Zealand |
| RASC | Société Royale d'Astronomie du Canada |
| RASC | Socit Royale d'Astronomie du Canada |
| RASGBI | Royal Asiatic Society |
| RASGBI | Royal Asiatic Society of Great Britain & Ireland |
| RASGBI | Royal Asiatic Society of Great Britain and Ireland |
| RASH | Rayek Admiration Society for Humans |
| RASHKB | Royal Asiatic Society Hong Kong Branch |
| RASI | Rock Art Society of India |
| RASKB | ‹Ëž0žxÓ /è |
| RASKB | Royal Asiatic Society Korea Branch |
| RASO | Remote Astronomical Society Observatory |
| RASON | Radio Amateur Society of Norfolk |
| RASON | Radio Amateur Society of Norwich |
| RASQ | Royal Agricultural Society of Queensland |
| RASS | Richmond Area Speleological Society |
| RASSL | Royal Asiatic Society of Sri Lanka |
| RAST | Radio Amateur Society of Thailand |
| RASV | Royal Agricultural Society of Victoria |