| AA |
anti-aircraft guns |
| ABC |
Admiral Andrew B. Cunningham |
| ACAS |
Assistant Chief of Air Staff |
| ACNS (H) |
Assistant Chief of Naval Staff (Home) |
| ADC |
Air Defence Committee |
| ADGB |
Air Defence of Great Britain |
| AI |
Airborne Interception |
| AMSO |
Air Member for Supply and Organisation, Air Council |
| AMT |
Air Member for Training, Air Council |
| AOC |
area officer commanding (RAF) |
| APS |
Assistant Private Secretary |
| A/S |
anti-submarine |
| BBC |
British Broadcasting Corporation |
| BBK |
Papers of Lord Beaverbrook, held in Parliamentary Archives, House of Lords, London |
| BEF |
British Expeditionary Force |
| BL |
British Library |
| CAS |
Chief of Staff, Air Ministry |
| CH |
Chain Home |
| CHL |
Chain Home Low |
| CIGS |
Chief of Imperial General Staff, War Office |
| C-in-C |
commander-in-chief |
| CMG |
Companion of the Most Distinguished Order of St. Michael and St. George |
| DCAS |
Deputy Chief of Air Staff |
| DFC |
Distinguished Flying Cross |
| DFM |
Distinguished Flying Medal |
| DNAD |
Director of Naval Air Division |
| DNI |
Director of Naval Intelligence |
| DOD (H) |
Director of Operations Division (Home), Royal Navy |
| D of P |
Director of Plans |
| DOR |
Director of Operational Requirements, RAF |
| DPS |
Director of Personal Services |
| DSD |
Director of Staff Duties |
| DSO |
Distinguished Service Order |
| GCB |
Grand Cross in the Order of the Bath |
| GPO |
General Post Office |
| HAC |
high-angle control (naval anti-aircraft gunnery) |
| HMSO |
His Majesty’s Stationery Office |
| HQ |
headquarters |
| HTT |
Papers of Sir Henry Tizard, Imperial War Museum, London |
| IFF |
Identification of Friend and Foe |
| IWM |
Imperial War Museum |
| IWM EDS |
Imperial War Museum, Enemy Documents Section |
| KCB |
Knight Commander of the Order of the Bath |
| LAC |
low-angle control (naval anti-aircraft gunnery) |
| LH |
Papers of Captain Basil Liddell Hart, Liddell |
| |
Hart Centre for Military Archives, London |
| MoD |
Ministry of Defence |
| MoD NID |
Ministry of Defence, Naval Historical Branch, Papers of Naval Intelligence Division |
| MoI |
Ministry of Information |
| MP |
member of Parliament |
| NCO |
non-commissioned officer(s) |
| NID |
Naval Intelligence Division |
| OIC |
Operational Intelligence Centre |
| OKH |
Oberkommando des Heeres (Supreme Command of the Army) |
| OKW |
Oberkommando der Wehrmacht (Supreme Command of the Armed Forces) |
| OTU |
operational training unit (RAF) |
| PA |
Parliamentary Archives, House of Lords, London |
| par |
paragraph |
| PC |
Panzerdurchsclags Cylindrisch (armor-piercing bomb) |
| PM |
prime minister |
| RAF |
Royal Air Force |
| RDF |
Radio Direction Finding (Radar) |
| RN |
Royal Navy |
| ROC |
Royal Observer Corps |
| ROSK |
Papers of Captain Stephen Roskill, Churchill Archives, Cambridge |
| R/T |
radio/telephone communication |
| SAP |
semi-armor-piercing |
| SC |
Sprengbombe Cylindrisch (general-purpose bomb) |
| SD |
Sprengbombe Dickwandig (semi-armor-piercing bomb) |
| SFTS |
Service Flying Training School(s) |
| S of S |
Secretary of State |
| SRS |
Stanmore Research Section |
| TNA ADM |
Admiralty service and operational records, held at the National Archives, Kew, United Kingdom |
| TNA AIR |
Air Ministry service and operational records, held at the National Archives |
| TNA CAB |
War Cabinet and Cabinets, Minutes and Papers, |
| |
1905–67, held at the National Archives |
| TNA FO |
Foreign Office, Files of Correspondence, 1906–66, held at the National Archives |
| TNA INF |
Ministry of Information, Files of Correspondence, 1936–50, held at the National Archives |
| TNA PREM |
Prime Minister’s Office, Files of Correspondence and Papers, 1916–42, held at the National Archives |
| TNA STAT |
Stationery Office, Files of Correspondence, 1871–1966, held at the National Archives |
| USAAF |
United States Army Air Forces |
| VC |
Victoria Cross |
| VCAS |
Vice Chief of Air Staff |
| VCNS |
Vice Chief of Naval Staff |
| VCNS (H) |
Vice Chief of Naval Staff (Home) |
| VHF |
very high frequency |
| WAC |
Written Archives Centre (BBC) |
| W/T |
wireless telegraphy |