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Glossary of intelligence-related expressions

Abwehr   German Intelligence and Security Service from 1920 to 1944.  More
CICI   Combined Intelligence Iraq
The principal British intelligence collection agency in Iraq (and later also Persia), based at Habaniyah and run by RAF officer Robert Dawson-Sheppard.
CIFE   Combined Intelligece Far East
MI5's regional organisation in the Far East during WWII. Established in 1943 at Kandy (Ceylon) by Courtenay Young, who was MI5's only Japanese-speaking officer.
Cold War   State of political and military tension in the period after WWII (1947-1991), between the Western Bloc (US, Europe, NATO) and the Eastern Bloc (Soviet Union and its Warsaw Pact allies).  Wikipedia
COPTINE   CODEWORD
NATO codeword — commonly used as
TOP SECRET COPTINE
— for classified (top secret) material about Western Stay-Behind Organisations (SBO) that were active during the Cold War, until approx. 1992.
CSDIC   Combined Services Detailed Interrogation Centre
British prisoner of war (POW) interrogation service, also known as MI19, operating during WWII from facilities in the UK and from regional centres in Cairo (Egypt) and Delhi (India).
DDR   Deutsche Demokratische Republik
The German Democratic Republic (GDR), commonly known as East Germany or the DDR, was a nation state that existed during the Cold War from 1949 to 1990. At the end of World War II (WWII), the territory — with the exception of West-Berlin — was administered by the Soviet Union (USSR).  Wikipedia  Spy
Drittes Reich   Nazi Germany
MASINT   Measurement and Signature Intelligence
DSO   Defence Security Officer
Cover for MI5 personnel posted overseas to British garrisons and colonies. DSOs were based in Aden, Bermuda, British Honduras, Cairo, Gibraltar, the Gold Coast, Iraq, Jamaica, Malta, Palestine and Trinidad.
Eastern Bloc   During the Cold War, Europe was divided into two separate areas, divided by an ideological and physical border known as the Iron Curtain. The area to the east of this border was commonly known as the Eastern Bloc, and consisted of the Soviet Union (USSR), the Soviet-controlled satellite states, and the countries of the Warsaw Pact.  Wikipedia
FVEY   Five Eyes
Anglophone intelligence alliance, consisting of Australia, Canada, New Zealand, the United Kingdom (UK) and the United States of America (USA).  More
Gladio   Italian Stay-Behind Organisation
Name of the Italian Stay-Behind organisation in the Cold War era, that would be activated as soon as Italy was invaded by the Russians. In polular culture, the name 'Gladio' is often used to identify the Stay-Behind organisations of other European countries as well.  Wikipedia
HARPOON   CODENAME
Codename of the pan-European FS-5000 spy radio set, secretly developed by AEG Telefunken in Germany on behalf of the German BND. Intended to be used by all Stay-Behind organisations in Europe and in some other countries, including non-NATO countries.  More
Iron Curtain   Ideological and physical border that divided Europe into two separate areas from the end of WWII to the end of the Cold War (1945-1991). To the west of this border was the free Western Bloc (NATO and West-European countries). To the east of the border was the Soviet Union and its Soviet-controlled satellites of the Warsaw Pact, also known as the Eastern Bloc.  Wikipedia

NATO   North Atlantic Treaty Organization
Intergovernmental military alliance between 31 North American and European countries, responsible for the implementation of the 1949 Atlantic Treaty.  More
Nazi Germany   In English, Nazi Germany is the common name for Germany between 1933 and 1945, when Adolf Hitler and his Nazi party (NSDAP) ruled the country through dictatorship. It is also known as Drittes Reich (English: Third Reich, or Third Empire) and Großdeutsches Reich (Greater German Reich).
O&I   Operatiën en Inlichtingen
Operations and Intelligence. Name of the Dutch Stay-Behind organisation during the Cold War. The secret organisation is also known as A&B.  More
OSINT   Open Source Intelligence
OTAN   NATO
French name for NATO
SBO   Stay-Behind Organisation
Secret organisation, consisting of intelligence and operational agents, tasked to gather information, pass this information to the government (in exile) and execute orders and (sabotage) operations, activated in the event of a war. During the Cold War, many West European countries had an SBO.  More
SDR   1. Surveillance Detection Route
Method used by an agent to ensure that he or she is not being followed. Commonly involves several changes in direction and means of transport. Also known as Surveillance Detection Run or Surveillance Detection Routine.
SDR   2. Surveillance Detection Routine Surveillance Detection Route
SDR   3. Software Defined Radio
Receiver (or transceiver) in which (most of) the analogue circuits have been replaced by digital alternatives implemented in software.
SF   Special Forces
SHAPE   Supreme Headquarters Allied Powers Europe
Headquarters of the Allied Command Operations (ACO), one of NATO's two strategic military commands.  Website
SIGINT   Signals Intelligence
SIME   Security Intelligence Middle East
Regional MI5 branch in the Middle East during WWII. Established in December 1939 based at the Grey Pillars compound in Cairo (Egypt) and represented by local defence security officers (DSOs) in Aden, Palestine, Iraq, Türkiye and Syria. The main task of SIME was conducting counterespionage investigations.
SIS   1. Secret Intelligence Service (UK)
Foreign intelligence service of the UK government, also known as MI6.  More
SIS   2. Signals Intelligence Service (US)
SIS   3. Special Intelligence Service (US)
SIS   4. Servizio di Informazione Segrete (Italy)
SOE   Special Operations Executive
British espionage, sabotage and reconnaissance organisation during WWII, active from 22 July 1940 to 15 January 1946. Also known as Churchill's Secret Army and as the Ministry of Ungentlemanly Warfare. Approx. 13,000 people were involved in the SOE, 3200 of which were women.  More  Wikipedia
Soviet Union   The USSR, or Union of Soviet Socialist Republics, commonly abbreviated Soviet Union, was a Marxist-Leninist federation of states on the Eurasian continent that existed between 1922 and 1991. It was controlled by the Communist Party with Moscow (Russia) as its capital.  Wikipedia
Third Reich   Nazi Germany
USSR   Union of Soviet Socialist Republics Soviet Union
VI   Voluntary Interceptor
Private individual working voluntarily as a radio interceptor for the Radio Security Service (RSS) during WWII. Most VIs were licenced amateur radio operators working from their homes.
WP   Warsaw Pact
Collective defense treaty among eight communist states in Central and Eastern Europe, lead by the Soviet Union (USSR), that existed during the Cold War. The members were Albania, Bulgaria, Czechoslovakia, East-Germany (DDR), Hungary, Poland, Romania and the Soviet Union (USSR).  More  Wikipedia
WU   Western Union
European military alliance between France, the UK, Belgium, The Netherlands and Luxemburg, that existed from 1948 to 1954. Also known as the Brussels Treaty Organisation (BTO). Precursor of NATO.
WWI   World War I
Global war from 1914 to 1918. Also known as the First World War, WW1 and The Great War (the war to end all wars).  Wikipedia
WWII   World War II
Global war from 1939 to 1945 between two military alliances: the Allies and the Axis. It was the most widespread and probably also the most well-documented war in history. Also known as The Second World War and WW2.  WWII spy radio sets  Wikipedia
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© Crypto Museum. Created: Sunday 24 August 2025. Last changed: Monday, 25 August 2025 - 22:39 CET.
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