Espionage is a subset of human intelligence, one of many intelligence collection methods, which are organized by intelligence collection management.[1]
This lists is restricted to organizations that operate clandestine human sources in foreign countries and non-national groups. It does not include police organizations with domestic informers, or, on an international basis, human sources that do counterintelligence work alone.
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References
- ↑ Katz, Brian (2020-07-13). "The Collection Edge: Harnessing Emerging Technologies for Intelligence Collection".
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