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What (who) is compact discs - definition

DIGITAL OPTICAL DISC DATA STORAGE FORMAT

Compact disk; CDs; C.D; CD; Music compact disc; Compact Disk; CD recording; Compact discs; Audio CDs; Cd; Compact audio disc; CD-quality; CD quality; Compact Laser Disc; Compact Laser Disk; Compact disks; Compact Discs; MIDI disc; Un CD; CompactDisk; Compact Disks; C.d.; C D; Compact Disc; Digital record

compact disc

(compact discs)

Note: in AM, also use 'compact disk'

Compact discs are small shiny discs that contain music or computer information. The abbreviation CD
is also used.

N-COUNT: also on N

compact disc

¦ noun a small plastic disc on which music or other digital information is stored in the form of a pattern of metal-coated pits from which it can be read using laser light reflected off the disc.

Compact Disc

<storage> (CD) (Not "disk", this spelling is part of the standard). A 4.72 inch disc developed by Sony and Philips that can store, on the same disc, still and/or moving images in monochrome and/or color; stereo or two separate sound tracks integrated with and/or separate from the images; and digital program and information files. The same fabrication process is used to make both audio CDs and CD-ROMs for storing computer data, the only difference is in the device used to read the CD (the player or drive). {CD Information Center (http://cd-info.com/cd-info/CDInfoCenter.html)}. ?? (1999-06-23)

Wikipedia

Compact disc

The compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. In August 1982, the first compact disc was manufactured. It was then released in October 1982 in Japan and branded as Digital Audio Compact Disc. It was released on March 2, 1983 in North America and Europe.

The format was later adapted (as CD-ROM) for general-purpose data storage. Several other formats were further derived, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video CD (VCD), Super Video CD (SVCD), Photo CD, Picture CD, Compact Disc-Interactive (CD-i) and Enhanced Music CD.

Standard CDs have a diameter of 120 millimetres (4.7 in) and are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650 MiB of data. Capacity is routinely extended to 80 minutes and 700 MiB by arranging data more closely on the same-sized disc. The Mini CD has various diameters ranging from 60 to 80 millimetres (2.4 to 3.1 in); they are sometimes used for CD singles, storing up to 24 minutes of audio, or delivering device drivers.

At the time of the technology's introduction in 1982, a CD could store much more data than a personal computer hard disk drive, which would typically hold 10 MiB. By 2010, hard drives commonly offered as much storage space as a thousand CDs, while their prices had plummeted to commodity levels. In 2004, worldwide sales of audio CDs, CD-ROMs, and CD-Rs reached about 30 billion discs. By 2007, 200 billion CDs had been sold worldwide.

https://en.wikipedia.org/wiki/Compact disc

Examples of use of compact discs

1. Then the arrival of compact discs pushed the capacity up over 1,000 in the 1'80s.

2. Using FOIA, TRAC has obtained the data on compact discs every three months.

3. These gruesome killings are filmed and then burned on to compact discs, which are widely distributed.

4. The musicians are also highlighted in three new compact discs from the Smithsonian Institution‘s Folkways Recordings.

5. The encyclopedia is available in jihadist circles in book form as well as on compact discs.