Disc
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A disc (International English) or disk (American English), from Latin discus which itself derives from Greek δίσκος, is a flat circular object. It may also refer to:
Data storage
- Disk storage, a general category of data storage mechanisms
- Magnetic disk
- Floppy disk, a magnetic data storage device using a flexible disc
- Hard disk drive, a non-volatile magnetic data storage device
- Optical disc, commonly a polycarbonate disc
- Blu-ray Disc (BD), a high-density optical disc intended mainly for video storage
- Compact Disc (CD), a form of optical disc used mainly for audio data
- Digital Versatile Disc (DVD), a form of optical disc used mainly for video and other data
- Enhanced Versatile Disc (EVD), an optical medium-based digital audio/video format under development
- High-Definition Digital Versatile Disc (HD DVD), a high-density optical disc intended mainly for video storage
- Holographic Versatile Disc (HVD), a next generation ultra-high-density optical disc format replacement for Blu-ray
- Laserdisc (LD), the first commercial optical disc storage medium
- MiniDisc (MD), a magneto-optical disc-based data storage device
- Disc film, a still-photography film format
- RAM disk, a volatile solid state drive
- Magnetic disk
- Analog discs typically relying on a modulated groove to record signals
- Gramophone record, an analog recording medium
- LP record, a specific type of gramophone record
- Aluminum disc, an analog recording disc used mainly for early radio recordings
- Acetate disc, an aluminium disc coated with nitrocellulose lacquer
Science
Astronomy
- Accretion disc, diffuse material in orbital motion around a central body such as a star or black hole
- Debris disk, a ring shaped circumstellar disk of dust and debris in orbit around a star
- Disc (galaxy), a disc-shaped group of stars
- Protoplanetary disk, a rotating disc of dense gas surrounding a newly formed star, a form of accretion disc
- Scattered disc, a distant region of the Solar System thinly populated by icy minor planets
Biology
- Death-inducing signaling complex, a multi-protein complex formed by members of the death receptor family of apoptosis-inducing cellular receptors
- Disk, an enlargement or outgrowth from the receptacle of the flower
- Intervertebral disc, in animal anatomy, part of the spine
- Placenta or placental disc, in mammals, an organ that connects a developing fetus to its mother's uterus
- Optic disc, in the retina
Mathematics
- Disk (mathematics), the region in a plane enclosed by a circle
- Disk algebra, a concept in function theory
- Unit disk, a disk with radius one
Psychology
- DISC1 (Disrupted in Schizophrenia 1), a human gene with a wide array of interactions
- DISC assessment, in psychology, a group of psychometric tests based on the work of William Moulton Marston
Motoring
- Disc brake, a device for slowing or stopping the rotation of a wheel
- Disc parking, a parking regulation with free parking when using a parking disc (clock disc)
- Vehicle licence, commonly known as a "tax disc" in the UK, is a vehicle licence receipt placed inside the windscreen
DISC
- Defence Intelligence and Security Centre (DISC), location of the Headquarters of both the Defence College of Intelligence and the British Army Intelligence Corps
- Delaware Independent School Conference (DISC) or Independent Conference (Delaware), a high-school sports conference
- Devrimci İşçi Sendikaları Konfederasyonu ("DİSK") (Confederation of Revolutionary Trade Unions of Turkey in English), a trade union centre
- Día Internacional de la Seguridad de Cómputo (DISC) ("International Computer Security Day" in English), an academic conference held annually at the Universidad Nacional Autonoma de Mexico (UNAM) since 1994
- Domestic international sales corporation (DISC), a provision in U.S. tax law
- Dundee International Sports Centre (DISC), a sports centre in Scotland
- International Symposium on Distributed Computing, abbreviated as "DISC", an academic conference
Other uses
- Disc (band), an American experimental music band
- Disc (magazine), a British music magazine, at one time known as Disc and Music Echo
- Disc harrow, a farm implement
- Disc jockey, a person who selects and plays pre-recorded music for an audience
- Discworld, a comedic fantasy book series by the British author Terry Pratchett
- Flying disc, a throwing toy, also known as the Frisbee
- Disk (album), a 1995 EP by electronic artist Moby
See also
- Spelling of disc
- Discus (disambiguation), disc in Latin
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