Observer Explained

An observer is one who engages in observation or in watching an experiment.

Observer may also refer to:

Computer science and information theory

In information theory, any system which receives information from an object
State observer in control theory, a system that models a real system in order to provide an estimate of its internal state
Observer pattern, a design pattern used in computer programming

Fiction

Observer (novel), a 2023 science fiction novel by Robert Lanza and Nancy Kress
Observer (video game), a cyberpunk horror video game
Observer (Mystery Science Theater 3000), a fictional television character
Observers, beings in the television show Fringe

Military

Air observer, an aircrew member
Artillery observer, a front line personnel who directs fire discipline for artillery strikes
Observer, a non-participating officer, or umpire, tasked with observing the actions of soldiers during a field training or military exercise

Music

"Observer", a song by Gary Numan on his album The Pleasure Principle
"The Observer", a track from The Flaming Lips' 1999 album The Soft Bulletin
The Observers, an alternative name for reggae session band Soul Syndicate
Niney the Observer (born 1951), Jamaican record producer and singer

Publications

Observer.com, an online-only version of the weekly newspaper The New York Observer
Observer (APS), a member magazine of Association for Psychological Science

Science

Other uses

Observer status, granted by an organization to allow a non-member limited participation
An election observer, one who assists in election monitoring
A game official sometimes used in the sport Ultimate
The Observer type in the Enneagram of Personality model
Donald Alaster Macdonald (1859–1932), Australian journalist who wrote under the pseudonym 'Observer'

See also

Observer effect (disambiguation)
National Observer (disambiguation), a variety of publications
The Observer (disambiguation)
United Nations Military Observer