Signals Intelligence, commonly known as SIGINT, is a type of intelligence-gathering involving the interception and collection of information from various electronic signals. It is an essential tool used by many organizations, most notably the military, to better understand their opponents’ activities and intentions. 

The National Security Agency (NSA) is the primary SIGINT organization responsible for collecting and analyzing signals to uncover intelligence. However, other organizations have their own SIGINT capabilities, such as the CIA’s Directorate of Digital Innovation and the FBI’s National Security Branch. 

Information gathered using SIGINT aids in quicker, more effective decision-making when identifying possible threats. Although SIGINT is not new, how it is gathered has exponentially changed since its inception.