In 1947, engineers working on Harvard's Mark II found a moth trapped in a component and taped it into the logbook as the first actual case of a bug being found.

Format Web Page

"In 1947, engineers working on Harvard’s Mark II found a moth trapped in a component and taped it into the logbook as the first actual case of a bug being found."

The Smithsonian preserves the original Mark II logbook and documents the 1947 moth incident and its famous handwritten note.

Source title Log Book With Computer Bug

Source authors Smithsonian Institution

Source year 1947

Confidence high

Importance mid