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Human Source Intelligence (HUMINT)

● Agents (Controlled Sources)

● Informants (Willing Sources)

● Observers (Attaches)

Imagery Intelligence (IMINT)

● Photo/Digital

● Electro-Optical

● Multispectral

Open Source Intelligence (OSINT)

● Public Documents

● Newspapers

● Television and Radio

Signals Intelligence

● COMINT (Communications)

● ELINT (Electronic)

● FISINT (Telemetry)

Measurement and Signatures Intelligence (MASINT)

● ACINT (Acoustic)

● RADINT (Radiation)

● Infrared

● Radar

● Books and

Journals

Source: Modified from a Department of Defense publication.

Figure 5. National Intelligence Production Resources.

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