Intelligence
- Intelligence cycle management
- Intelligence collection management
- Intelligence collection management
- HUMINT
- HUMINT
- Clandestine HUMINT
- Clandestine HUMINT asset recruiting
- Clandestine HUMINT operational techniques
- Clandestine HUMINT and covert action
- Direct action (military)
- Clandestine cell system
- Special reconnaissance
- List of Special Reconnaissance organizations
- Espionage
- Agent handling
- Black bag operation
- Concealment device
- Cryptography
- Cut-out (espionage)
- Dead drop
- Eavesdropping
- False flag
- Non-official cover
- Interrogation
- Numbers station
- One-way voice link
- Steganography
- Surveillance
- Agent of influence
- Agent provocateur
- Atomic spies
- Bodlim
- Covert agent
- Dangle (espionage)
- Defection
- Double agent
- Field agent
- Informant
- Intelligence officer
- Katsa
- Labor spies
- Mole (espionage)
- Official cover
- Resident (title)
- Resident spy
- Sayanim
- Sleeper agent
- Spymaster
- Stay-behind
- Undercover
- Walk-in agent