FIT 100
© Copyright University of
Washington 1999-2000
The First Computer Bug Was A Moth
vThe term “bug” for a computer glitch was coined by Adm. Grace
Murray Hopper when working on the Harvard Mark II computer
The moth was found in Relay #70 -- an electro-mechanical switch -- and
taped into the logbook with the caption “First actual case of a bug being
found”