Look up: mi5

1. MI5
   British security service responsible for national security matters within the United Kingdom
   Found on http://www.secondworldwar.co.uk/glossm.h
   
   
2. MI5
   Abbreviation for Military Intelligence, section five, the counter-intelligence agency of the British intelligence services. Its role is to prevent or investigate espionage, subversion, and...
   Found on http://www.encyclo.co.uk/local/20688
   
   
3. MI5
   Military Intelligence 5 - Covername of the Security Service
   Found on http://www.psywar.co.uk/glossary.php
   
   
4. MI5
   Commonly used but unofficial title for the Security Service.
   Found on https://www.sis.gov.uk/glossary.html
   
   
5. MI5
   intelligence agency charged with internal security and domestic counterintelligence activities of the United Kingdom. It is authorized to investigate ... [2 related articles]
   Found on http://www.britannica.com/eb/a-z/m/83
   
   
6. Mi5
   MI5 is the British security Service. It was formerly known as Section 5 of Military Intelligence, and hence the name MI5. Its main job is to protect British secrets at home from foreign spies and to prevent domestic sabotage, subversion and the theft of state secrets.
   Found on http://www.probertencyclopaedia.com/brow
   
   
7. MI5
   Abbreviation for Military Intelligence, section five, the counter-intelligence agency of the British intelligence services. Its role is to prevent or investigate espionage, subversion, and sabotage. The headquarters of MI5 are at Thames House, Millbank, London
   Found on http://www.talktalk.co.uk/reference/ency