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CO

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CO or variants may refer to:

Chemistry

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  • Carbon monoxide (CO), a colorless, odorless, and tasteless gas
  • Carbonyl group, composed of a carbon atom double-bonded to an oxygen atom: C=O
  • Cobalt, a chemical element, symbol Co

Computing and telecommunications

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Mathematics

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People

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Places

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Ranks and titles

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Transportation

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Mail system

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  • In Italy, c/o, also ℅ or in the capital form C/O, is an abbreviation used in postal shipments to indicate a person other than the recipient, but to whom the message is physically addressed.

Other uses

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See also

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