| Abbreviation | Definition |
|---|---|
| RTPT | Restrictive Trade Practices Tribunal |
| RTSCI | Russian Trading System Cash Index |
| RTTB | Race To The Bottom |
| RWA | Returned Without Action |
| RWE | Rheinisch-Westfälische Elektrizitätswerke (German Power Supply company) |
| S.C. | Sales Confirmation |
| SA | Sociedad Anonima |
| SA | Sole Agent |
| SA | Swap Agrement |
| SAARC | South Asian Association for Regional Cooperation |
| SAB | Service Application Block |
| SABRE | Synergetic Air Breathing Rocket Engine |
| SACO | Sino American Cooperative Organization |
| SACU | Southern African Customs Union |
| SAFA | Sydney Association For Astrophysics |
| SAFTA | Singapore Australia Free Trade Agreement |
| SAFTA | South Asia Free Trade Agreement |
| SAFTA | South Asian Free Trade Area |
| SANE | The South African New Economics |
| SAPTA | SAARC (South Asian Association for Regional Cooperation) Preferential Trading Arrangement |