| Abbreviation | Definition |
|---|---|
| S&S | Simon and Schuster |
| S&S | Stop Shop |
| S&S | Stop & Shop |
| S&T | Strategy and Tactics |
| S4D | Space4Development |
| S4HC | Solutions for Human Capital, Inc. |
| S4Y | Service4You |
| SA | Salvation Army |
| SA | Simpsons Arcade |
| SA | Sociedad An |
| SA | Sociedad Anónima |
| SA | Societate pe Actiuni |
| SAA | South African Airways |
| SAA | Subaru Aftermarket Accessories |
| SAAB | Svenska Aeroplan AB |
| SAAB | Svenska Aeroplan Aktie Bolaget |
| SAADA | San Antonio Automobile Dealers Association, Inc. |
| SAARC | South Asian Association for Regional Corporation |
| SAB | Studio Arctic Banana |
| SAB | Sutherland, Asbill, & Brennan, L. L. P. |