Disc

Look up disc or disk in Wiktionary, the free dictionary.

Disc or disk (computing and American English) may 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
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

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

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

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 assessment, in psychology, a group of psychometric tests based on the work of William Moulton Marston
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), a high-school sports conference
Devrimci İşçi Sendikaları Konfederasyonu ("DİSK") (Confederation of Revolutionary Trade Unions of Turkey in English), a trade union centre
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

Frisbee, a piece of sports equipment
Disc (band), an American experimental music band
Disc (magazine), a British music magazine, at one time known as Disc and Music Echo
Disk (album), a 1995 EP by electronic artist Moby