| AA |
Anti-aircraft |
| ABCEF |
Arabian Bengal Ceylon Escort Force |
| ABV |
Armed Boarding Vessels |
| ACES |
Amenities, Comforts and Entertainments for the Services |
| ADJA |
Assistant Deputy Judge Advocate |
| AIC |
Action Information Centre |
| AIOC |
Anglo-Iranian Oil Company |
| AMC |
Armed Merchant Cruisers |
| AMTC |
Army Medical Training Centre |
| AMV |
Armed Merchant Vessel |
| A/S |
Anti-submarine |
| ASDIC |
Allied Submarine Detection Investigation Committee |
| ASTO |
Assistant Sea Transport Officer |
| ATRO |
Assistant Technical Recruiting Officer |
| BGO |
Base Gunnery Officer |
| BL |
Breech Loading |
| BLO |
Bombardment Liaison Officer |
| BOR |
British Other Rank |
| BRNVR |
Burma Royal Naval Volunteer Reserve |
| BSS |
Beach Signal Station |
| BYMS |
British Yard Mine Sweepers |
| CB |
Companion of the Bath |
| CBE |
Commander of (the Order of) the British Empire |
| CBs |
Confidential Books |
| CCFET |
Captain Coastal Forces Eastern Theatre |
| C-in-C |
Commander-in-Chief |
| CIE |
Companion of (the Order of) the Indian Empire |
| CMG |
Companion of (the Order of) St Michael and St George |
| CO |
Commanding Officer |
| COF |
Captain of the Fleet |
| CPO |
Chief Petty Officer |
| CS |
Continuous Service |
| CSI |
Companion of (the Order of) the Star of India |
| DARD |
Director of Admiralty, Research and Development |
| DC&SC(I) |
Director of Civil and Services Censorship (India) |
| DEMS |
Defensively Equipped Merchant Shipping |
| DGSR |
Director General Ship Repairs |
| DJA |
Deputy Judge Advocate |
| DR (Position) |
Dead Reckoning (Position) |
| DSC |
Distinguished Service Cross |
| DSM |
Distinguished Service Medal |
| DSO |
Distinguished Service Order |
| EAs |
Electrical Apprentices |
| ECO |
Emergency Commissioned Officer |
| ExO |
Executive Officer |
| FCB |
Fire Control Box |
| FDS |
Fauji Dilkhush Sabha |
| FKC |
Fuze Keeping Clock |
| FMO |
Fleet Mail Officer |
| FOB |
Forward Observer Bombardment |
| FOCRIN |
Flag Officer Commanding Royal Indian Navy |
| FPSC |
Federal Public Services Commission |
| G |
Gunnery |
| GHQ |
General Headquarters |
| GMO |
Gun Mounting Officer |
| HA |
High Angle |
| HDML, |
Harbour Defence Motor Launch |
| HE |
High Explosive |
| HMAS |
His Majesty’s Australian Ship |
| HMG |
His Majesty’s Government |
| HMIS |
His Majesty’s Indian Ship |
| HMS |
His Majesty’s Ship |
| HO |
Hostilities Only |
| HQ |
Headquarters |
| IAMC |
Indian Army Medical Corps |
| IAOC |
Indian Army Ordnance Corps |
| IDSM |
Indian Distinguished Service Medal |
| IMD |
Indian Medical Department |
| IMH |
Indian Military Hospital |
| IMMTS |
Indian Mercantile Marine Training Ship |
| IMS |
Indian Medical Service |
| INCS |
Indian Naval Canteen Service |
| IOR |
Indian Other Ranks |
| ISDPS |
Inter-Services Demobilisation Planning Staff |
| ISSAB |
Indian Sailors’ Soldiers’ and Airmen’s Board |
| ISSCS |
Inter-Services Security Co-ordination Section |
| ISSD |
Inter-Services Security Directorate |
| IWT |
Inland Water Transport |
| JA |
Judge Advocate |
| JP |
Justice of the Peace |
| KCB |
Knight Commander of (the Order of) the Bath |
| KCIE |
Knight Commander of (the Order of) the Indian Empire |
| LA |
Low Angle |
| LCA |
Landing Craft, Assault |
| LCB |
Landing Craft, Base |
| LCI(L) |
Landing Craft, Infantry (Large) |
| LCM |
Landing Craft, Mechanized |
| LCP(L) |
Landing Craft, Personnel (Large) |
| LCS |
Landing Craft, Support |
| LCS(M) |
Landing Craft, Support (Medium) |
| LCT |
Landing Craft, Tank |
| LCW |
Landing Craft, Wing |
| LND |
Local Naval Defence |
| Leg Sto |
Leading Stoker |
| L/S |
Leading Seaman |
| LSA |
Leading Store Assistant |
| LSI |
Landing Ship, Infantry |
| Lt |
Lieutenant |
| Lt Cdr |
Lieutenant Commander |
| MBE |
Member of (the Order of) the British Empire |
| MC |
Military Cross |
| MFV |
Motor Fishery Vessel |
| mg |
Machine gun |
| MGO |
Master General of the Ordnance |
| “MK” mutton |
Sheep killed by Muslim |
| ML |
Motor Launch |
| MO |
Medical Officer |
| M/S |
Minesweeper |
| MSF |
Mine Sweepers, Flotilla |
| MT |
Motor Transport; Mechanical Transport |
| MTB |
Motor Torpedo Boat |
| MTE |
Mechanical Training Establishment |
| MTFR |
Miniature Tracer Firing Range |
| MVO |
Member of the (Royal) Victorian Order |
| NCO |
Non-Commissioned Officer |
| NCS |
Non-Continuous Service |
| NHQ(I) |
Naval Headquarters (India) |
| NOIC |
Naval Officer-in-Charge |
| NSKO |
Naval Store Keeping Officer |
| NSO |
Naval Store Officer |
| NWFP |
North-West Frontier Province |
| OBE |
Officer of (the Order of) the British Empire |
| OCAS |
Officer-in-Charge Armament Supply |
| OETD |
Ordnance Export Transit Depot |
| OOD |
Order of the Day |
| OOQ |
Officer of the Quarter |
| OOW |
Officer of the Watch |
| Ord Seaman |
Ordinary Seaman |
| PO |
Petty Officer |
| P&O |
Peninsular and Oriental (Company) |
| PSTO |
Principal Sea Transport Officer |
| PT |
Physical Training |
| PTI |
Physical Training Instructor |
| QF |
Quick Firing |
| QR |
Quarter Range |
| R |
Repeated |
| RAF |
Royal Air Force |
| RAOC |
Royal Army Ordnance Corps |
| RD |
Royal Dragoons |
| R/F |
Range Finder |
| RIAF |
Royal Indian Air Force |
| RIASC |
Royal Indian Army Service Corps |
| RIFR |
Royal Indian Fleet Reserve |
| RIM |
Royal Indian Marine |
| RIN |
Royal Indian Navy |
| RINR |
Royal Indian Naval Reserve |
| RINVR |
Royal Indian Naval Volunteer Reserve |
| RN |
Royal Navy |
| RNR |
Royal Naval Reserve |
| RNVR |
Royal Naval Volunteer Reserve |
| revs |
Revolutions |
| (S) |
Supply |
| SANF |
South African Naval Flotilla |
| SBA |
Sick Berth Attendant |
| SC |
Swept Channel |
| SIO |
Senior Inspecting Officer |
| S/Lt |
Sub Lieutenant |
| SMO |
Senior Medical Officer |
| SNO |
Senior Naval Officer |
| SO |
Senior Officer |
| SORSF |
Senior Officer Red Sea Force |
| (Sp) |
Special |
| SP |
Selection of Personnel |
| SOLWING |
Senior Officer Landing Craft Wing |
| SS |
Short Service; Steam Ship |
| STO |
Sea Transport Officer |
| TNT |
Trinitrotoluene |
| TOO |
Time of Origin |
| USAAF |
United States Army Air Forces |
| V/S |
Visual Signalling |
| VSIS |
Victualling Store Issue Ship |
| WAC(I) |
Women’s Auxiliary Corps (India) |
| WO |
Warrant Officer |
| WRNS |
Women’s Royal Naval Service |
| WRINS |
Women’s Royal Indian Naval Service |
| W/T |
Wireless Telegraphy |
| XDO |
Extended Defense Officer |