| Abbreviation | Definition |
|---|---|
| FRS | Federation of Regulation Society |
| FRS | Fellow of Royal Society |
| FRS | Fellowship of the Royal Society |
| FRSA | Fellow of the Royal Society of Arts |
| FRSB | Fellow of the Royal Society of Biology |
| FRSC | Fellow of the Royal Society of Canada |
| FRSE | Fellows the Royal Society of Edinburgh |
| FRSE | Fellowship of the Royal Society of Edinburgh |
| FRSGS | Fellow of the Royal Scottish Geographical Society |
| FRSH | Fellow Royal Society of Health |
| FRSL | Fellow of Royal Society of London |
| FRSN | Fellow of the Royal Society of New South Wales |
| FRSPH | Fellow of Royal Society for Public Health |
| FSA | Finlands Automationssällskap rf |
| FSA | Finlands Automationssllskap rf |
| FSA | Finnish Society of Automation |
| FSA | Suomen Automaatioseura ry |
| FSAS | Federation of Scottish Aquarist Societies |
| FSBI | Fisheries Society of The British Isles |
| FSBS | First Serbian Benevolent Society |