CD (disambiguation)

A CD or compact disc is a thin plastic silvery disc for audio recordings.

CD and variants may also refer to:

Computing

• cd (command), a command line command to change the current working directory in operating systems
• CD-ROM, compact disc technology applied for use in computer data

Science

• Cadmium or Cd, a chemical element
• Candela or cd, a unit of light intensity
• Circular dichroism, a form of spectroscopy
• Cluster of differentiation, a protocol used for the identification of cell surface molecules on white blood cells
• Cordoba Durchmusterung, a star catalog of the southern sky
• Drag coefficient or c_d, a dimensionless quantity used to quantify the drag of an object in a fluid
• Type-cD galaxy, a galaxy morphology classification

Organizations

• Post-nominal letters for recipients of Canadian Forces Decoration
• Centre Democrats (Denmark), a Danish former political party
• Centre Democrats (Netherlands), a former political party of the Netherlands
• České Dráhy or ČD, a railway operator of the Czech Republic
• Commander of the Order of Distinction, a rank in the Jamaican Orders of Societies of Honour
• Community of Democracies, an intergovernmental organization of democracies and democratizing countries
• Conference on Disarmament, an international forum that negotiates multilateral arms control and disarmament agreements
• Corps Diplomatique, the collective body of foreign diplomats accredited to a particular country or body
• Centro Democratico, a political party in Italy

Other uses

• Geely CD, a coupe automobile from Geely Automobile
• Cairo Damascus or Damascus Document, a text found among the Dead Sea Scrolls
• Certificate of deposit, a bank account in the United States with a fixed maturity date
• Civil Defense
• Companion dog (title), a title offered to dogs by the American Kennel Club for dog obedience
• Conduct disorder
• Democratic Republic of the Congo's ISO 3166-1 alpha-2 country code
  • .cd, the Internet domain of the Democratic Republic of the Congo
• CD, the Roman numeral for 400
• "CD", a song by T2
• -CD, the North American call sign suffix for Class A low-power television stations operating with digital signals

See also

• Conservation Dependent or LR/cd, an IUCN category
• Cosmological decade or CÐ, a unit of time