The three sub-intelligence disciplines in SIGINT are Communications Intelligence (COMINT), Electronic Intelligence (ELINT), and Foreign Instrumentation Signals Intelligence (FISINT). COMINT deals with intercepting and analyzing communication signals, ELINT focuses on non-communication signals like radar, and FISINT involves studying signals from foreign instrumentation and weapons systems.

SIGINT is an abbreviation for signals intelligence. It refers to the collection, analysis, and exploitation of information from electronic signals and communications systems. SIGINT is often used by intelligence agencies to gather intelligence on adversaries, monitor communications, and uncover potential threats to national security.

SIGINT stands for Signals Intelligence. The SIGINT is intelligence gathering by interception of signals, whether between people, involving electronic signals not directly used in communication or a combination of the two. As a means of collecting intelligence, SIGINT is a subset of intelligence collection management.

COMINT, ELINT, and FISINT

COMINT, ELINT, and FISINT