• Boot
• Boot disk
• Defragmentation
• Hard
• Hard disk
• It s hard
• Ntfs

Disk

• In biology, an intervertebral disc is a cartilaginous joint between vertebrae in the spine of vertebrate animals.
• In mathematics, a disk is a geometrical object. See Disk (mathematics).
• An analogue disc record is a gramophone or phonograph recording medium, usually consisting of a long spiral groove in a vinyl or lacquer platter.
• The hard disk and floppy disk are magnetic storage media used in computers.
• A variety of optical storage media, such as the compact disc, DVD, and laserdisc, are used for digital data or video.
• Disc brakes are often used in automobiles.
• In astrophysics, an accretion disc or disk is a structure formed by material falling into a gravitational source.
• The Frisbee is a flying disc toy.

Table of contents

1 Disk or Disc? 2 See also 3 External link

Disk or Disc?

The divergence in spelling is due in part to the way in which the words originated. Disk came into the English language in the mid-17th century, and was modelled on words such as whisk; disc arose some time later, and was based on the original Latin root discus. In the 19th century, disc became the conventional spelling for audio recordings made on a flat plate, such as the analogue disc record; this usage gave rise to the modern term disc jockey. Early BBC technicians differentiated between disks (in-house transcription records) and discs (the colloquial term for commercial gramophone records, or what the BBC dubbed CGRs).

By the 20th century, the c-spelling was more popular in British English, while the k-spelling was preferred in American English. In the 1940s, when the American company IBM pioneered the first hard disk storage devices, the k-spelling was used. In 1979 the European company Philips, along with Sony, developed the compact disc medium; here, the c-spelling was chosen, possibly because of the predominating British spelling, or because the compact disc was seen as a successor to the analogue disc record.

Whatever their heritage, in computer jargon today it is common for the k-spelling to refer mainly to magnetic storage devices, while the c-spelling is customary for optical media such as the compact disc and similar technologies. Even in the computing field, however, the terms are used inconsistently; software documentation often uses the k-spelling exclusively.

Etymology: from Greek δίσκος, a flat round object athletes competed in throwing.  See discus throw.

See also

• Biology
  • Intervertebral disc
  • Discus (fish)
• Computing
  • Hard disk
  • Floppy disk
  • Disk storage
  • RAM disk
• Mathematics
  • Disk (mathematics)
  • Euler's disk
  • Unit disc
• Astrophysics
  • Protoplanetary disc
  • Accretion disc
  • Scattered disk object
• Audio and Video
  • Compact disc
  • Analogue disc record
  • Nipkow disk
  • Laserdisc
  • DVD
  • Advanced Optical Disc
  • Blu-ray Disc
  • MiniDisc
• Discus throw

• Usage note from American Heritage Dictionary