In 1945, Grace Murray Hopper was working on the Harvard University Mark II Aiken Relay Calculator (a primitive computer). On the 9th of September, 1945, when the machine was experiencing problems, an investigation showed that there was a moth trapped between the points of Relay #70, in Panel F. The operators removed the moth and affixed it to the log. The entry reads: "First actual case of bug being found."
http://www.jamesshuggins.com/h/tek1/first_computer_bug.htm
Поздравляю
rlabs, silver_dew и katerinka_lux c профессиональным праздником! Ну и программистов конечно тоже :)