Grace Hopper found an actual moth stuck in a computer relay and taped it into the logbook. That was 1947. She was a Navy officer and mathematician who helped create COBOL, the programming language that still runs banking systems and government mainframes worldwide. Hopper retired from the Navy as a rear admiral at 79 — the oldest active-duty officer in the U.S. armed forces at the time. They'd recalled her from retirement twice because they kept needing her. The Navy named a destroyer after her. The moth is in the Smithsonian.