Ask someone to identify the first computer bug, and he or she might mention computer programmer Grace Hopper and the dead moth found in a relay of Harvard University’s Mark II electromechanical computer in 1947 so reports the IEEE.
The term apparently came up after a technician found said moth, Hopper and her staff used the word “bug” to describe the issues that complicated the input of data and the writing, loading, and processing of programs in their Mark I and II computers however it is simply a variant of a “fly in the ointment.” and use of “bug” to describe a flaw in the design or operation of a technical system dates back to Thomas Edison.
Edison coined the phrase to describe technical problems during the process of innovation.