❑ HUMINT(HUMan INTelligence) : Collecting information using people. White/Black agent.
❑ TECHINT(TECHnical INTelligence) : Collecting information using technic.
❍ SIGINT(SIGnals INTelligence) : Signal detection.
- COMINT(COMmunications INTelligence) : Communication signal detection.
- ELINT(ELectronic INTelligence) : Non-communication signal detection(Electronic wave).
- FISINT(Foreign Instrumentation Signals INTelligence) : Signal from foreign electromagnetic emissions. It contains human language and instrument language.
❍ IMINT(IMagery INTelligence) : Collecting information using an video capture system.
❍ MASINT(Measurement And Signature INTelligence) : Collecting information like heat or radiation using an measuring instrument.
* MASINT ⊃ {Electro-optical MASINT, Nuclear MASINT, Geophysical MASINT, Radar MASINT, Materials MASINT, Radiofrequency MASINT}
❑ OSINT(Open source INTelligence) : Collecting information using opened information such as newspaper or internet.