A glitch is a short-lived fault in a system. The term is particularly common in the computing and electronics industries, and in circuit bending, as well as among players of video games, although it is applied to all types of systems including human organizations and nature. The term derives from the German glitschig, meaning 'slippery.'
, a glitch is an electrical pulse of short duration that is usually the result of a fault or design error, particularly in a digital circuit
. For example, many electronic components such as flip-flops
are triggered by a pulse that must not be shorter than a specified minimum duration, otherwise the component may malfunction. A pulse shorter than the specified minimum is called a glitch. A related concept is the runt pulse
, a pulse whose amplitude is smaller than the minimum level specified for correct operation, and a spike
, a short pulse similar to a glitch but often caused by ringing
A glitch can occur in the presence of race condition in a poorly designed digital logic circuit.
A computer glitch
is the failure of a system, usually containing a computing device, to complete its functions or to perform them properly. It frequently refers to an error which is not detected at the time it occurs but shows up later in data errors or incorrect human decisions. While the fault is usually attributed to the computer hardware
, this is often not the case since hardware failures rarely go undetected. Other situations which are frequently called computer glitches are:
- Incorrectly written software (software bug)
- Incorrect instructions given by the operator (operator error) (this might also be considered a software bug)
- Undetected invalid input data (this might also be considered a software bug)
- Undetected communications errors
- Computer viruses
- Computer security cracking (sometimes erroneously called "hacking")
- Another human error unrelated to the computer
Canadian Oxford lists it as a 20th century word of unknown origin.
Some reference books, including Random House's American Slang, say it comes from the German word glitschen ("to slip") and the Yiddish word gletshn ("to slide or skid"). Either way it's fairly new. So new, in fact, that on July 23, 1965, Time magazine felt it necessary to define it in an article: "Glitches — a spaceman's word for irritating disturbances."
Video game glitches
In video games, a glitch is a programming error which results in behavior not intended by the programmers. Glitches may include incorrectly displayed graphics, collision detection errors, game-freezing or crashes, sound issues, and others. Some glitches are potentially dangerous to the game save data.
"Glitching" is the practice of a player exploiting faults in a video game's programming to achieve tasks normally impossible if the game's script runs as intended (Such as running through walls or defying gravity).
During quality assurance (such as the role of a game tester for video games), glitches must be located, a report compiled, and then fed back to the programmers.
Though commonly used by game players and the general public, the term "glitch" is rarely used by game developers, publishers, and qa departments. Instead, the more common term of software bug, or simply bug, is used by professionals working in the video game industry.