x•ACRONYMS AND ABBREVIATIONS
CIS Combined Intelligence Service
CMG Companion of the Most Distinguished Order of St.
Michael and St. George
CPGB Communist Party of Great Britain
CRPO Combined Research and Planning Office
CSDIC Combined Services Detailed Interrogation Centre
CSO Composite Signals Organisation
D/F Direction finding
DGIA Defence Geographic and Imagery Intelligence Agency
DGSS Director-General of the Security Service
DIAS Defence Intelligence Analysis Staff
DIS Defence Intelligence Staff
DISC Defence Intelligence and Security Centre
DMI Director of Military Intelligence
DNI Director of Naval Intelligence
DORA Defence of the Realm Act
DSO Defence Security Officer; Distinguished Service Order
DST Direction de la Surveillance du Territoire (French
security service)
DWS Diplomatic Wireless Service
EAM Greek National Liberation Front
EDES Greek Antimonarchist Resistance Front
ELAS Guerrilla wing of the Greek National Liberation Front
EOKA Ethniki Organosis Kyprion Agoniston (National
Organization of Cypriot Combatants)
FBI Federal Bureau of Investigation (U.S.)
FECB Far East Combined Bureau
FRU Force Research Unit
FSB Federalnaya Sluzhba Bezopasnosti (Russian security
service)
GC&CS Government Code and Cypher School
GCHQ Government Communications Headquarters
GCMG Knight Grand Cross of the Most Distinguished Order of
St. Michael and St. George
GHQ General Headquarters
GPO General Post Office
GRU Glavnoye Razvedyvatel’noe Upravlenie (Soviet military
intelligence service)