Last updated: 08 October 2009
CDI - Chief of Defence Intelligence
CPNI - Centre for the Protection of National Infrastructure
DIS - Defence Intelligence Staff
FCO - Foreign and Commonwealth Office
GCHQ - Government Communications Headquarters
HMG - Her Majesty's Government
ICC - Interception of Communications Commissioner
IPT - Investigatory Powers Tribunal
ISC - Intelligence and Security Committee
IS - Intelligence Secretariat
JIC - Joint Intelligence Committee
JTAC - Joint Terrorism Analysis Centre
MoD - Ministry of Defence
NSID(I) - National Security, International Relations and Development sub-Committee on Intelligence
PSIS - Permanent Secretaries on the Intelligence Service
RIPA - Regulation of Investigatory Powers Act
SIA - Single Intelligence Account
SIC - Security Intelligence Co-ordinator
Sigint - Signals Intelligence and Information Assurance
SIS - Secret Intelligence Service
SOE - Special Operations Executive
TNA - The National Archives