What is Electronic Intelligence (ELINT)? ELINT is information derived primarily from electronic signals that do not contain speech or text (which are considered COMINT). Cryptologic History Center - NSA pdf file.
"This publication presents a historical perspective for informational and educational purposes, is the result of independent research, and does not necessarily reflect a position of NSA/CSS or any other U.S. government entity." Great Cover Photo. Good document.
Colonel Lasswell?s first significant effort in Communications Intelligence came in July of 1940 when, as a Captain, he was assigned to the 4th Marine Regiment in China.