| AC | Aircraftsman |
| ACA | Associate, Institute of Chartered Accountants |
| ACCA | Association of Chartered Certified Accountants |
| ADC | Aide de Camp |
| Adjt. | Adjutant |
| Adm. | Admiral |
| AEA | American Economic Association |
| AFC | Air Force Cross |
| AG | Aktiengesellschaft (German PLC) |
| AIA | American Institute of Architects |
| AMIAgrE | Associate Member, Institution of Agricultural Engineers |
| AMICE | Associate Member, Institution of Civil Engineers |
| AMIChemE | Associate Member, Institution of Chemical Engineers |
| AMIEE | Associate Member, Institution of Electrical Engineers |
| AMIMarE | Associate Member, Institute of Marine Engineers |
| AMIMechE | Associate Member, Institution of Mechanical Engineers |
| AMRAeS | Associate Member, Royal Aeronautical Society |
| AMTPI | Associate Member, Town Planning Institute |
| AOC | Air Officer in charge of Administration |
| APM | Assistant Provost Marshal |
| APTC | Army Physical Training Corps |
| ARA | Associate, Royal Academy, London |
| ARAeS | Associate, Royal Aeronautical Society |
| ARIBA | Associate, Royal Institute of British Architects |
| ARICS | Associate, Royal Institution of Chartered Surveyors |
| ARSM | Associate, Royal Schools of Music |
| ASC | Army Service Corps |
| assoc. | Associate |
| asst. | Assistant |
| AWRE | Atomic Weapons Research Establishment |
| BAOR | British Army of the Rhine |
| BBC | British Broadcasting Corporation |
| Bde | Brigade |
| BEF | British Expeditionary Force |
| BMA | British Medical Association |
| Brig. -Gen. | Brigadier-General |
| CA | Chartered Accountant |
| called to bar | Barrister |
| Capt. | Captain |
| CB | The Most Honourable Order of the Bath |
| CBE | Commander, Order of the British Empire |
| CC | County Council; City Council; Chamber of Commerce; County Court |
| CCC | County Cricket Club |
| Cdr. | Commander |
| Cdre. | Commodore |
| CEng | Chartered Engineer |
| CEO | Chief Executive Officer |
| CFO | Chief Financial Officer |
| chmn. | Chairman |
| CinC | Commander in Chief |
| CISA | Certified Information Systems Auditor |
| CMG | Companion of the Order of St Michael and St George |
| CMS | Church Missionary Society |
| CNA | Certified Nursing Assistant |
| CO | Commanding Officer |
| co. | Company |
| col. | Colonel |
| Comdr. | Commander |
| comms. | Communications |
| Cons. | Conservative (Political Party) |
| consult. | Consultant |
| CPRE | Campaign to Protect Rural England |
| CRAeS | Companion, Royal Aeronautical Society |
| CVO | Chief Visionary Officer |
| DAQMG | Deputy Adjutant and Quartermaster-General |
| DBE | Dame Commander of the Most Excellent Order of the British Empire |
| DC | District Council |
| DDS | Doctor of Dental Surgery |
| dep. | Deputy |
| Dept. | Department |
| dir. | Director |
| Divn. | Division |
| DL | Deputy Lieutenant |
| DO | Osteopathic Doctor; Director of Operations |
| DOE | Department of Education; Department of Energy |
| DPM | Doctor of Physical Medicine |
| DSC | Distinguished Service Cross |
| DSO | Distinguished Service Order |
| EIC | East India Company |
| exec. | Executive |
| exhib. | Exhibition(er) |
| FA | Football Association |
| FAIA | Fellow, American Institute of Architects |
| FAPM | Fellow, Association for Project Management |
| FBA | Fellow, British Academy |
| FCA | Financial Conduct Authority |
| FCIArb | Fellow, Chartered Institute of Arbitrators |
| FCIBSE | Fellow, Chartered Institution of Building Services Engineers |
| FCO | Foreign and Commonwealth Office |
| FCWA | Fellow, Institute of Cost and Works Accountants |
| FEng | Fellow, Engineering |
| FFARCS | Fellow, Faculty of Anaesthetists of the Royal College of Surgeons |
| FGS | Fellow, Geological Society |
| FIA | Fellow, Institute of Actuaries |
| FICE | Fellow, Institution of Civil Engineers |
| FIChemE | Fellow, Institution of Chemical Engineers |
| FIHT | Fellow, Institute of Highways and Transportation |
| FIMA | Fellow, Institute of Mathematics and its Applications |
| FIMechE | Fellow, Institution of Mechanical Engineers |
| FInstP | Fellow, Institute of Physics |
| FIStructE | Fellow, Institution of Structural Engineers |
| FLS | Fellow, Linnaean Society |
| Flt Lieut. | Flight Lieutenant |
| FM | Field Marshall |
| FO | Field Officer |
| FPS | Fellow, Pharmaceutical Society of Great Britain |
| FRAeS | Fellow, Royal Aeronautical Society |
| FRAM | Fellow, Royal Academy of Music |
| FRCM | Fellow, Royal College of Midwives |
| FRCOG | Fellow, Royal College of Obstetricians |
| FRCP | Fellow, Royal College of Physicians |
| FRCS | Fellow, Royal Colleges of Surgeons |
| FREng | Fellow, Royal Academy of Engineering |
| FRHistS | Fellow, Royal Historical Society |
| FRIBA | Fellow, Royal Institute of British Architects |
| FRIC | Fellow, Royal Institute of Chemistry |
| FRINA | Fellow, Royal Institution of Naval Architects |
| FRS | Fellow, Royal Society |
| FRSA | Fellow, Royal Society of Arts |
| FRSC | Fellow, Royal Society of Chemistry |
| FRSE | Fellow, Royal Society of Edinburgh |
| FRTPI | Fellow, Royal Town Planning Institute |
| FSA | Fellow, Society of Antiquaries |
| FSEE | Fellow, Society of Environmental Engineers |
| FSI | Fellow, Chartered Surveyors' Institution |
| FZS | Fellow, Zoological Society |
| GBE | Knight/Dame Grand Cross of the Most Excellent Order of the British Empire |
| GCB | Knight Grand Cross of the Order of the Bath |
| GCH | Knight Grand Cross of the Royal Guelphic Order (Hanoverian Order) |
| GCIE | Knight Grand Cross of the Most Eminent Order of the Indian Empire |
| GCMG | Grand Cross of St Michael and St George |
| GCSI | Knight Grand Cross of the Most Exalted Order of the Star of India |
| GCVO | Knight Grand Cross of the Royal Victorian Order |
| GHQ | General Headquarters |
| GP | General Practitioner |
| GSO | General Staff Officer |
| GWR | Great Western Railway |
| HAC | Honourable Artillery Company |
| HLI | Highland Light Infantry |
| HM | Headmaster |
| Hosp. | Hospital |
| IA | Indian Army |
| ICS | Indian Civil Service |
| ILEA | Institute for Lifecycle Environmental Assessment |
| IMechE | Institution of Mechanical Engineers |
| Inst. | Institute |
| internat. | International |
| ISO | (Companion of the) Imperial Service Order |
| JP | Justice of the Peace |
| jun. | Junior |
| KB | Knight Bachelor; Knight of the Order of the Bath |
| KBE | Knight Commander of the Most Excellent Order of the British Empire |
| KC | King’s Counsel |
| KCB | Knight Commander of the Order of the Bath |
| KCH | Knight commander of the Royal Guelphic Order (Hanoverian Order) |
| KCIE | Knight Commander of the Order of the Indian Empire |
| KCMG | Knight Commander of the Order of St Michael and St George |
| KCSI | Knight Commander of the Most Exalted Order of the Star of India |
| KCVO | Knight Commander of the Royal Victorian Order |
| KG | Knight Companion of the Most Ancient Order of the Garter |
| KP | Knight, Order of St Patrick |
| KT | Knight, Order of the Thistle |
| Lab | Labour (Political Party); Laboratory |
| LCC | London County Council |
| Lieut. | Lieutenant |
| LMS | London, Midland and Scottish Railway |
| LPTB | London Passenger Transport Board |
| ltd. | Limited |
| Maj. | Major |
| man. | Manager |
| MBE | Member, Most Excellent Order of the British Empire |
| MBIM | Member, British Institute of Management |
| MC | Military Cross |
| MCIBSE | Member, Chartered Institution of Building Services Engineers. |
| MCIHT | Member, Chartered Institution of Highways & Transportation |
| MD | Medical Doctor |
| med. | Medical |
| MEP | Member of European Parliament |
| MIAgrE | Member, Institution of Agricultural Engineers |
| MICE | Member, Institution of Civil Engineers |
| MIChemE | Member, Institution of Chemical Engineers |
| MIEE | Member, Institution of Electrical Engineers |
| MIERE | Member, Institution of Electronic and Radio Engineers |
| MIMarE | Member, Institute of Marine Engineers |
| MIMechE | Member, Institution of Mechanical Engineers |
| MIMinE | Member, Institute of Mining Engineers |
| MIMM | Member, Institution of Mining and Metallurgy |
| MInstCE | Member, Institution of Civil Engineers |
| MInstISP | Member, Institute of Information Security Professionals |
| MInstP | Member, Institute of Physics |
| MIProdE | Member, Institution of Production Engineers |
| MIStructE | Member, Institution of Structural Engineers |
| MO | Medical Officer |
| MOD | Ministry of Defence |
| MP | Member of Parliament |
| MRAC | Member, Royal Agricultural College |
| MRAeS | Member, Royal Aeronautical Society |
| MRCGP | Member, Royal College of General Practitioners |
| MRCOG | Member, Royal College of Obstetricians and Gynaecologists |
| MRCP | Member, Royal College of Physicians |
| MRCPath | Member, Royal College of Pathologists |
| MRCPsych | Member, Royal College of Psychiatrists |
| MRCS | Member, Royal College of Surgeons |
| MRCVS | Member, Royal College of Veterinary Surgeons |
| MRIA | Member, Royal Irish Academy |
| MRINA | Member, Royal Institution of Naval Architects |
| MRSC | Member, Royal Society of Chemistry |
| MRTPI | Member, Royal Town Planning Institute |
| MSAID | Member, Society of Industrial Artists and Designers |
| Nat. | National |
| OBE | Officer of the Most Excellent Order of the British Empire |
| OC | Officer Commanding |
| OM | Order of Merit |
| ops. | Operations |
| ord. | Ordained |
| OTC | Officers Training Corps |
| PC | Privy Councillor; Police Constable |
| PLA | Port of London Authority |
| plc. | PLC [Public Limited Company] |
| PMO | Principal Medical Officer |
| PO | Petty Officer; Pilot Officer |
| Pres. | President |
| Prof. | Professor |
| PS | Permanent/Private Secretary |
| PWD | Public Works Department |
| QC | Queen’s Counsel |
| QMC | Quality Management Coordinator |
| QMG | Quartermaster-General |
| QSO | Queen's Service Order (New Zealand) |
| RA | Royal Artillery; Rear Admiral |
| RAAF | Royal Auxiliary Air Force |
| RAF | Royal Air Force |
| RAFVR | Royal Air Force Volunteer Reserve |
| RAMC | Royal Army Medical Corps |
| RARO | Regular Army Reserve of Officers |
| RASC | Royal Army Service Corps |
| RBA | Royal Society of British Artists |
| RD | Royal Dragoons |
| RDC | Royal Defence Corps; Rural District Council |
| RE | Royal Engineers |
| Regt. | Regiment |
| res. | Resident |
| retd. | Retired |
| RFA | Royal Field Artillery; Royal Fleet Auxiliary |
| RFC | Royal Flying Corps |
| RHA | Royal Horse Artillery |
| RIASC | Royal Indian Army Service Corps |
| RM | Royal Marines; Resident Magistrate |
| RMA | Royal Marine Artillery |
| RN | Royal Navy |
| RNR | Royal Naval Reserve |
| RNR | Royal Naval Reserve |
| RNVR | Royal Naval Volunteer Reserve |
| RO | Receiving Officer |
| Roy. | Royal |
| RSPB | Royal Society for the Protection of Birds |
| RUSI | Royal United Services Institute for Defence and Security Studies |
| RYA | Royal Yachting Association |
| sec. | Secretary |
| Sen. | Senior |
| SHAEF | Supreme Headquarters Allied Expeditionary Force |
| SMO | Senior Medical Officer |
| Spec. Res. | Special Reserve |
| SPG | Society for the Propagation of the Gospel |
| Sqdn Ldr | Squadron Leader |
| St Barts | St Bartholomews |
| St Thom. | St Thomas's |
| TA | Territorial Army |
| TD | Territorial Decoration |
| TF | Territorial Force |
| UDC | Urban District Council |
| UKSIF | United Kingdom Sustainable Investment and Finance |
| UNRRA | United Nations Relief and Rehabilitation Administration |
| VC | Victoria Cross |
| VD | Victorian Decoration |
| VSO | Voluntary Service Overseas |
| WO | Warrant Officer |
| WRAF | Women's Royal Air Force |
| WRNS | Women’s Royal Naval Service |
| WWF | World Wide Fund for Nature; World Wildlife Fund (pre-1986) |
| YMCA | Young Men's Christian Association |
