The first actual computer bug
Computers are always giving us grief, and the term “computer bug” is bandied around to describe all sorts of things going wrong. While technically a “bug” is (uaually) a fault a the program running on the computer, there are exceptions.
Depending on whether you believe the US Navy or wikipedia the first actual computer bug was found in either 1945 or 1947.

First actual case of bug being found
It’s a moth, trapped between points in one of the large electromechanical computers of the day. The image is the page from the log book where it was taped after being extracted from the computer. If only present-day bugs were so easy to find and remove…