The First Recorded Computer Bug Was a Real Insect 🧠📜
The word “computer bug” is used every day — but its origin is not a metaphor.
It was literal.
In 1947, engineers working on the Harvard Mark II computer noticed the system malfunctioning. After investigation, they discovered the cause:
🐛 A real moth trapped inside a relay, physically disrupting the machine’s operation.
The engineers carefully removed the insect, taped it into the official logbook, and wrote the now-famous note:
“First actual case of a bug being found.”
That logbook still exists today and is preserved in Harvard’s official archives, making this one of the most well-documented moments in computing history.
While the term “bug” had been used informally before, this event cemented its meaning in computer science — and the word has been used ever since to describe errors in hardware and software.
In this video, discover:
✨ What the Harvard Mark II was
✨ How early computers worked using relays
✨ Why insects could cause real failures
✨ The true origin of the word “bug”
✨ How one small moth changed tech language forever
Modern computing began with room-sized machines…
and one very unlucky insect.
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