| Abbreviation | Definition |
|---|---|
| RGS | Really Good Sh*t |
| RGS | Reflection Grating Spectrometers |
| RGS | Regional Government Services |
| RGS | repeated Gram Schmidt |
| RGS | right guards And sometimes |
| RGS | Rockhampton Grammar School |
| RGS | Root Growth Stimulator |
| RGS | Roy Gripske and Sons |
| RGS | Ruhr Graduate School |
| RGS | Russell Global Sectors |
| RGSA | Refined Gravitational Search Algorithm |
| RGSM | Rajiv Gandhi Shiksha Mahavidyalaya |
| RGSM | Random Gentle Sex Master |
| RGSM | Rotary Green Square Markets |
| RGSS | Reliance Group Support Services |
| RGST | Rat Glutathione S Transferase |
| RGST | Reaction Group Situation Test |
| RGST | Reformed General Sales Tax |
| RGST | Reformed Goods Services Tax |
| RGST | Rheinische Gesellschaft für Systemische Therapie |