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DEPARTMENT OF THE NAVY -- NAVAL HISTORICAL CENTER
805 KIDDER BREESE SE -- WASHINGTON NAVY YARD
WASHINGTON DC 20374-5060

Online Library of Selected Images -- Picture Data

Photo #: NH 96566-KN (Color)

The First "Computer Bug"

Moth found trapped between points at Relay # 70, Panel F, of the Mark II Aiken Relay Calculator while it was being tested at Harvard University, 9 September 1945. The operators affixed the moth to the computer log, with the entry: "First actual case of bug being found". They put out the word that they had "debugged" the machine, thus introducing the term "debugging a computer program".
In 1988, the log, with the moth still taped by the entry, was in the Naval Surface Warfare Center Computer Museum at Dahlgren, Virginia.

Courtesy of the Naval Surface Warfare Center, Dahlgren, VA., 1988.

U.S. Naval Historical Center Photograph.

Online Image: 94KB; 740 x 615 pixels

 

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24 August 1999