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Apparently we call them bugs because Grace Hopper found the first computer “bug”: a moth stuck between the relays on the Harvard Mark II on September 9, 1945. On September 9, 1945, at 1545 hours, technicians found the culprit: a moth trapped between two of the machine’s thousands of relay points. Christine M. Kreiser. The first explicitly identified computer bug was a moth, smashed to death in a relay on the Harvard Mark II electromechanical computer. Among those working on the Mark II in 1947 was mathematician and computer programmer Grace Hopper, who later became a Navy rear admiral. The operators removed the moth and taped it to the log. The notion of bugs was described in other fields previously, but the moth discovery was the first use of the term ‘debugging’ in the field of computers.

This "bug" was an actual real … This log book was probably not Hopper's, but she and the rest of … Grace Hopper, who was working at Harvard University at the time, enjoys telling the story of how on September 9 1947 at the Harvard University the Mark II … Grace Hopper also reported that the term "bug" was used to describe problems in radar electronics during WWII.

It seems most likely that the bug was a typo that occurred when the program was typeset for printing.

The first computer bug is called so because it was the first documented case of a bug actually being found in a computer. It was Turing-complete, and able to solve "a large class of numerical problems" through reprogramming.. A software bug is an error, flaw or fault in a computer program or system that causes it to produce an incorrect or unexpected result, or to behave in unintended ways. The entry reads: "First actual case of bug being found." Well, the entry ("First actual case of bug being found.") Grace Hopper added the caption "First actual case of bug being found," and that's the first time anyone used the word bug to describe a computer glitch.
(See the picture below.)
The following texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the Web their texts will used only for illustrative educational and scientific purposes only. The words "bug" and "debug" soon became a standard part of the language of computer programmers. Science +2 Age Levels Elementary (9 to 12 years old), Middle School (13 to 15 years old), High School (16 to 18 years old)

The words “bug” and “debug” soon became a standard part of the language of computer programmers. The first explicitly identified computer bug was a moth, smashed to death in a relay on the Harvard Mark II electromechanical computer. She thus became the first programmer in history. On September 9th, 1947, Grace Hopper found the first actual computer bug. shows that the term was already in use before the moth was discovered. The actual first bug seems to have been in the actual first ever program. ENIAC (/ ˈ ɛ n i æ k /; Electronic Numerical Integrator and Computer) was the first electronic general-purpose digital computer. They taped the insect in their logbook and labeled it "first actual case of bug being found." Ada Lovelace wrote a program (well, we THINK she wrote it) to illustrate the capability of Charles Babbages’ Analytical engine (which was never built). What was the world's first computer bug in 1946 . The First Computer Bug.

Famously, the very first instance of a computer "bug" was recorded at 3:45 pm (15:45) on the 9th of September 1947.

Naturally, the term debugging followed. One week after Americans celebrated the end of World War II, the massive Mark II computer that ran ordnance calculations for the U.S. Navy shut down. What was the world's first computer bug in 1946 . But something unusual happened when computer scientists recently translated her program to run it on a modern computer: it turned out to contain a bug. A moth was stuck between relays of the Harvard Mark II computer, and she documented this finding in her log book. They had "debugged" the machine and the terms computer bug and "debugging a computer program" were born.
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