Venn diagram showing a list of Linux signals (SIGTRAP, SIGQUIT, SIGILL, SIGFPE, SIGBUS, etc) at left and a list of intelligence types (COMINT, HUMINT, ELINT, IMINT, OSINT) at right. In the overlap is SIGINT.
https://files.ioc.exchange/media_attachments/files/111/602/448/795/023/238/original/4cd63f4836813ba8.png