An error, flaw, or fault in any computer software or hardware system. It results in unexpected and unwanted results, causing the system to behave weirdly. Put simply, and it is any fault in the computer system that keeps it from performing what it is intended to do.
Most bugs take place because of mistakes caused by developers while creating the code or the design. There could be errors in the components or operating systems used by the program in question.
Some bugs could result from errors in translation between languages, resulting in illegible or incorrect code. It can be a subtle bug or can result in a system crash or freezing. Some bugs can cause security issues and enable malicious users to obtain unauthorized access to your system.
The term "Computer Bug" may be a relatively new word. But it has been used in the formal engineering world for quite a long time. The concept might date back to 1843 when Ada Lovelace, a UK-based English mathematician, and writer, referred to problematic program cards in the analytical engine of Charles Babbage. Lovelace spoke about wrong orders performed by the analytical engine, referred to as cards, not bugs.
The first recorded use of the word “bug comes from Thomas Edison. In a letter he wrote in 1878 to an associated, he wrote, “I find a bug in my apparatus of telephones.”
In November of the same year, Edison wrote to Theodore Puskas, “This thing gives out bugs – as such little faults are called.”
But the late, great Isaac Asimov is probably the one who made the term "bug" popular in the general public. He used the word in 1944 to refer to issues with a robot. The American writer and professor wrote, “U.S. robots had got plenty of bugs out of multiple robots used for field-testing.
Reportedly, it is said that the first usage of the word “bug” for computers was recorded on September 9, 1947. Interestingly, it was a real-life moth preserved behind an adhesive tape on the logbook of machines.
On the same day, a leading computer engineer, Grace Hopper, found an error on the Mark II to a dead moth. He carefully removed and taped the inspect to the logbook.
The term computer bug was used to describe that particular event. While Harvard Mark II operators did not introduce the term 'bug,' the incident certainly contributed to its popularity.
As a result, the word “bug” became a generally used term to describe any glitches or errors in a computer program