| f | father |
| F and GP | Finance and General Purposes |
| F/Lt | Flight Lieutenant |
| F/O | Flying Officer |
| FA | Football Association |
| FAA | Fleet Air Arm; Fellow, Australian Academy of Science |
| FAAV | Fellow, Association of Agricultural Valuers |
| FABE | Fellow, Association of Building Engineers |
| FACC | Fellow, American College of Cardiology |
| FACCA | Fellow, Association of Certified and Corporate Accountants |
| FACE | Fellow, Australian College of Education |
| FACOG | Fellow, American College of Obstetricians and Gynaecologists |
| FACP | Fellow, American College of Physicians |
| FACS | Fellow, American College of Surgeons |
| FAI | Fellow, Chartered Auctioneers' and Estate Agents' Institute; Federation Aeronautique Intemationale |
| FAIA | Fellow, American Institute of Architects |
| FAIAS | Fellow, Australian Institute of Agricultural Science |
| FAIM | Fellow, Australian Institute of Management |
| FAMS | Fellow, Ancient Monuments Society |
| FANY | First Aid Nursing Yeomanry |
| FANZCA | Fellow, Australian and New Zealand College of Anaesthetists |
| FAO | Food and Agriculture Organization of the United Nations |
| FARELF | Far East Land Forces |
| FAS | Fellow, Antiquarian Society; Fellow, Nigerian Academy of Science; Funding Agency for Schools |
| FASA | Fellow, Australian Society of Accountants |
| FASCE | Fellow, American Society of Civil Engineers |
| FBA | Fellow, British Academy; Federation of British Artists |
| FBHI | Fellow, British Horological Institute; Fellow, British Horticultural Institute |
| FBI | Federation of British Industries; Federal Bureau of Investigation |
| FBIM | Fellow, British Institute of Management |
| FBIS | Fellow, British Interplanetary Society |
| FBOA | Fellow, British Optical Association |
| FC | Football Club |
| FCA | Fellow, Institute of Chartered Accountants; Fellow, Institute of Chartered Accountants in Australia; Fellow, New Zealand Society of Accountants; Federation of Canadian Artists |
| FCCA | Fellow, Chartered Association of Certified Accountants |
| FCCS | Fellow, Corporation of Secretaries (formerly of Certified Secretaries) |
| FCGI | Fellow, City and Guilds of London Institute |
| FCH | Fellow, Coopers Hill College |
| FCI | Fellow, Institute of Commerce |
| FCIArb | Fellow, Chartered Institute of Arbitrators |
| FCIB | Fellow, Corporation of Insurance Brokers; Fellow, Chartered Institute of Bankers |
| FCIBS | Fellow, Chartered Institution of Building Services; Fellow, Chartered Institute of Bankers in Scotland |
| FCII | Fellow, Chartered Insurance Institute |
| FCILA | Fellow, Chartered Institute of Loss Adjusters |
| FCIM | Fellow, Chartered Institute of Marketing; Fellow, Institute of Corporate Managers (Australia) |
| FCIOB | Fellow, Chartered Institute of Building |
| FCIPS | Fellow, Chartered Institute of Purchasing and Supply |
| FCIS | Fellow, Institute of Chartered Secretaries and Administrators (formerly Chartered Institute of Secretaries), |
| FCIT | Fellow, Chartered Institute of Transport |
| FCMA | Fellow, Chartered Institute of Management Accountants (formerly Institute of Cost and Management Accountants) |
| FCNA | Fellow, College of Nursing, Australia |
| FCO | Foreign and Commonwealth Office |
| FCommA | Fellow, Society of Commercial Accountants |
| FCP | Fellow, College of Preceptors |
| FCPA | Fellow, Australian Society of Certified Practising Accountants; Fellow, Canadian Psychological Association |
| FCPath | Fellow, College of Pathologists |
| FCPS | Fellow, College of Physicians and Surgeons |
| FCS | Federation of Conservative Students |
| FCSD | Fellow, Chartered Society of Designers |
| FCST | Fellow, College of Speech Therapists |
| FCT | Federal Capital Territory; Fellow, Association of Corporate Treasurers |
| FCU | Fighter Control Unit |
| FCWA | Fellow, Institute of Costs and Works Accountants |
| FDI | Federation Dentaire Internationale |
| FDS | Fellow in Dental Surgery |
| FDSRCS | Fellow in Dental Surgery, Royal College of Surgeons of England |
| FDSRCSE | Fellow in Dental Surgery, Royal College of Surgeons of Edinburgh |
| FE | Far East |
| FEAF | Far East Air Force |
| Fedn | Federation |
| FEE | Federation des Expertes Comptables Europeens |
| FEI | Federation Equestre Internationale |
| FEIS | Fellow, Educational Institute of Scotland |
| Fell | Fellow |
| FEng | Fellow, Royal Academy (formerly Fellowship) of Engineering |
| FES | Fellow, Entomological Society; Fellow, Ethnological Society |
| FESC | Fellow, European Society of Cardiology |
| FF | Fianna Fail; Field Force |
| FFA | Fellow, Faculty of Actuaries (in Scotland); Fellow, Institute of Financial Accountants |
| FFAEM | Fellow, Faculty of Accident and Emergency Medicine |
| FFARACS | Fellow, Faculty of Anaesthetists, Royal Australasian College of Surgeons |
| FFARCS | Fellow, Faculty of Anaesthetists, Royal College of Surgeons of England |
| FFARCSI | Fellow, Faculty of Anaesthetists, Royal College of Surgeons in Ireland |
| FFAS | Fellow, Faculty of Architects and Surveyors, London |
| FFB | Fellow, Faculty of Building |
| FFCM | Fellow, Faculty of Community Medicine |
| FFDRCSI | Fellow, Faculty of Dentistry, Royal College of Surgeons in Ireland |
| FFFP | Fellow, Faculty of Family Planning of the Royal College of Obstetricians and Gynaecologists |
| FFOM | Fellow, Faculty of Occupational Medicine |
| FFR | Fellow, Faculty of Radiologists |
| FGCL | Fellow, Goldsmiths' College, London |
| FGS | Fellow, Geological Society |
| FGSM | Fellow, Guildhall School of Music and Drama |
| FHS | Fellow, Heraldry Society; Forces Help Society and Lord Roberts Workshops |
| FHSA | Family Health Services Authority |
| FIA | Fellow, Institute of Actuaries |
| FIAA | Fellow, Institute of Actuaries of Australia |
| FIAgrM | Fellow, Institute of Agricultural Management |
| FIAL | Fellow, International Institute of Arts and Letters |
| FIArb | Fellow, Institute of Arbitrators |
| FIB | Fellow, Institute of Bankers |
| FIBiol | Fellow, Institute of Biology |
| FIC | Fellow, Institute of Chemistry; Fellow, Imperial College, London |
| FICA | Fellow, Commonwealth Institute of Accountants; Fellow, Institute of Chartered Accountants in England and Wales |
| FICE | Fellow, Institution of Civil Engineers |
| FIChemE | Fellow, Institution of Chemical Engineers |
| FICS | Fellow, Institute of Chartered Shipbrokers; Fellow, International College of Surgeons |
| FIDE | Federation Internationale des Echecs; Fellow, Institute of Design Engineers; Federation Internationale pour le Droit Europeen |
| FIEE | Fellow, Institution of Electrical Engineers |
| FIEEE | Fellow, Institute of Electrical and Electronics Engineers (NY) |
| FIEIE | Fellow, Institution of Electronics and Electrical Incorporated Engineers |
| FIGD | Fellow, Institute of Grocery Distribution |
| FIHM | Fellow, Institute of Housing Managers |
| FIHort | Fellow, Institute of Horticulture |
| FIHT | Fellow, Institution of Highways and Transportation |
| FIIB | Fellow, International Institute of Biotechnology |
| FIIC | Fellow, International Institute for Conservation of Historic and Artistic Works |
| FIL | Fellow, Institute of Linguists |
| FIM | Fellow, Institute of Materials (formerly Institution of Metallurgists, then Institute of Metals) |
| FIMA | Fellow, Institute of Mathematics and its Applications |
| FIMarE | Fellow, Institute of Marine Engineers |
| FIMBRA | Financial Intermediaries, Managers and Brokers Regulatory Association |
| FIMC | Fellow, Institute of Management Consultants |
| FIMechE | Fellow, Institution of Mechanical Engineers |
| FIMgt | Fellow, Institute of Management |
| FIMI | Fellow, Institute of the Motor Industry |
| FIMinE | Fellow, Institution of Mining Engineers |
| FIMM | Fellow, Institution of Mining and Metallurgy |
| FIMS | Fellow, Institute of Mathematical Statistics |
| FIN | Fellow, Institute of Navigation |
| FInstAM | Fellow, Institute of Administrative Management |
| FInstD | Fellow, Institute of Directors |
| FInstE | Fellow, Institute of Energy |
| FInstF | Fellow, Institute of Fuel |
| FInstM | Fellow, Institute of Meat; Fellow, Institute of Marketing |
| FInstP | Fellow, Institute of Physics |
| FInstPet | Fellow, Institute of Petroleum |
| FInstPI | Fellow, Institute of Patentees and Inventors |
| FInstW | Fellow, Institute of Welding |
| FINucE | Fellow, Institution of Nuclear Engineers |
| FIOB | Fellow, Institute of Building |
| FIP | Fellow, Australian Institute of Petroleum |
| FIPA | Fellow, Institute of Practitioners in Advertising |
| FIPD | Fellow, Institute of Personnel and Development |
| FIPM | Fellow, Institute of Personnel Management |
| FIPR | Fellow, Institute of Public Relations |
| FIProdE | Fellow, Institution of Production Engineers |
| FIQA | Fellow, Institute of Quality Assurance |
| FIStructE | Fellow, Institution of Structural Engineers |
| FIWEM | Fellow, Institution of Water and Environmental Management |
| FIWSc | Fellow, Institute of Wood Science |
| FKC | Fellow, King's College London |
| fl | floruit (flourished) |
| FLA | Fellow, Library Association |
| FLAS | Fellow, Chartered Land Agents' Society |
| FLCM | Fellow, London College of Music |
| FLI | Fellow, Landscape Institute |
| FLS | Fellow, Linnean Society |
| Flt | Flight |
| FM | Field-Marshal |
| FMA | Fellow, Museums Association |
| FMS | Federated Malay States; Fellow, Medical Society; Fellow, Institute of Management Services |
| FNA | Fellow, Indian National Science Academy |
| Fndn | Foundation |
| fndr | founder |
| FNI | Fellow, Nautical Institute; Fellow, National Institute of Sciences in India |
| FO | Foreign Office; Field Officer; Flying Officer |
| FOIC | Flag Officer in charge |
| For | Foreign |
| For Affrs | Foreign Affairs |
| FOREST | Freedom Organisation for the Right to Enjoy Smoking Tobacco |
| FOX | Futures and Options Exchange |
| FPA | Family Planning Association |
| FPhS | Fellow, Philosophical Society of England |
| FPRI | Fellow, Plastics and Rubber Institute |
| FPS | Fellow, Pharmaceutical Society; Fauna Preservation Society |
| FRA | Fellow, Royal Academy |
| FRACGP | Fellow, Royal Australian College of General Practitioners |
| FRACMA | Fellow, Royal Australian College of Medical Administrators |
| FRACOG | Fellow, Royal Australian College of Obstetricians and Gynaecologists |
| FRACP | Fellow, Royal Australasian College of Physicians |
| FRACS | Fellow, Royal Australasian College of Surgeons |
| FRAeS | Fellow, Royal Aeronautical Society |
| FRAgS | Fellow, Royal Agricultural Societies (of England, Scotland and Wales) |
| FRAI | Fellow, Royal Anthropological Institute of Great Britain and Ireland |
| FRAIA | Fellow, Royal Australian Institute of Architects |
| FRAM | Fellow, Royal Academy of Music |
| FRANZCP | Fellow, Royal Australian and New Zealand College of Psychiatrists |
| FRAS | Fellow, Royal Astronomical Society; Fellow, Royal Asiatic Society |
| FRASB | Fellow, Royal Asiatic Society of Bengal |
| FRASE | Fellow, Royal Agricultural Society of England |
| FRAstS | Fellow, Royal Astronomical Society |
| FRBS | Fellow, Royal Society of British Sculptors; Fellow, Royal Botanic Society |
| FRCA | Fellow, Royal College of Art; Fellow, Royal College of Anaesthetists |
| FRCGP | Fellow, Royal College of General Practitioners |
| FRCM | Fellow, Royal College of Music |
| FRCN | Fellow, Royal College of Nursing |
| FRCO | Fellow, Royal College of Organists |
| FRCOG | Fellow, Royal College of Obstetricians and Gynaecologists |
| FRCOphth | Fellow, Royal College of Ophthalmologists |
| FRCP | Fellow, Royal College of Physicians, London |
| FRCPA | Fellow, Royal College of Pathologists of Australasia |
| FRCPath | Fellow, Royal College of Pathologists |
| FRCPI | Fellow, Royal College of Physicians of Ireland |
| FRCPsych | Fellow, Royal College of Psychiatrists |
| FRCR | Fellow, Royal College of Radiologists |
| FRCS | Fellow, Royal College of Surgeons, England |
| FRCSCan | Fellow, Royal College of Surgeons of Canada |
| FRCSGlas | Fellow, Royal College of Physicians and Surgeons of Glasgow |
| FRCSI | Fellow, Royal College of Surgeons in Ireland |
| FRCSoc | Fellow, Royal Commonwealth Society |
| FRCVS | Fellow, Royal College of Veterinary Surgeons |
| FREconS | Fellow, Royal Economic Society |
| FRES | Fellow, Royal Empire Society, Royal Entomological Society of London |
| FRFPSG | Fellow, Royal Faculty of Physicians and Surgeons, Glasgow |
| FRGS | Fellow, Royal Geographical Society |
| FRHistS | Fellow, Royal Historical Society |
| FRHS | Fellow, Royal Horticultural Society |
| FRIAS | Fellow, Royal Incorporation of Architects of Scotland; Royal Institute for the Advancement of Science |
| FRIBA | Fellow, Royal Institute of British Architects |
| FRIC | Fellow, Royal Institute of Chemistry |
| FRICS | Fellow, Royal Institution of Chartered Surveyors |
| FRINA | Fellow, Royal Institution of Naval Architects |
| FRMetS | Fellow, Royal Meteorological Society |
| FRMS | Fellow, Royal Microscopical Society |
| FRNCM | Fellow, Royal Northern College of Music |
| FRNS | Fellow, Royal Numismatic Society |
| FRPS | Fellow, Royal Photographic Society |
| FRPSL | Fellow, Royal Philatelic Society, London |
| FRS | Fellow, Royal Society |
| FRSA | Fellow, Royal Society of Arts |
| FRSAI | Fellow, Royal Society of Antiquaries of Ireland |
| FRSAMD | Fellow, Royal Scottish Academy of Music and Drama |
| FRSC | Fellow, Royal Society of Canada; Fellow, Royal Society of Chemistry |
| FRSE | Fellow, Royal Society of Edinburgh |
| FRSGS | Fellow, Royal Scottish Geographical Society |
| FRSH | Fellow, Royal Society for the Promotion of Health |
| FRSL | Fellow, Royal Society of Literature |
| FRSNZ | Fellow, Royal Society of New Zealand |
| FRTPI | Fellow, Royal Town Planning Institute |
| FRTS | Fellow, Royal Television Society |
| FSA | Fellow, Society of Antiquaries; Fellow, Society of Arts |
| FSAA | Fellow, Society of Incorporated Accountants and Auditors |
| FSAI | Fellow, Society of Architectural Illustrators |
| FSAScot | Fellow, Society of Antiquaries of Scotland |
| FSCA | Fellow, Society of Company and Commercial Accountants |
| FScotvec | Fellow, Scottish Vocational Education Council |
| FSE | Fellow, Society of Engineers |
| FSI | Fellow, Chartered Surveyors' Institution; Fellow, Securities Institute |
| FSIA | Fellow, Securities Institute of Australia |
| FSLCOG | Fellow, Sri Lankan College of Obstetrics and Gynaecology |
| FSMC | Freeman of the Spectacle-Makers' Company |
| FSS | Fellow, Royal Statistical Society |
| FSTD | Fellow, Society of Typographic Designers |
| FSVA | Fellow, Incorporated Society of Valuers and Auctioneers |
| FT | Financial Times |
| FTCL | Fellow, Trinity College of Music, London |
| FUCUA | Federation of University Conservative and Unionist Associations |
| Fus | Fusiliers |
| FZS | Fellow, Zoological Society |