| FA | Field Artillery |
| FAAAS | Fellow American Association for the Advancement of Science |
| FBA | Fellow of the British Academy |
| FCPath | Fellow of the College of Pathologists |
| Fedl | Federal |
| Fell | Fellow |
| FInstBiol | Fellow of the Institute of Biology |
| Fndn | Foundation |
| Fndr | Founder |
| For | Foreign |
| FRCP | Fellow of the Royal College of Physicians |
| FRCS | Fellow of the Royal College of Surgeons |
| FRGS | Fellow of the Royal Geographical Society |
| FRS | Fellow of the Royal Society |
| FSA | Fellow of the Society of Antiquaries |