Co
The word(part) or abbreviation/acronym/initialism Co or CO has several meanings, depending on context:
- Carbon monoxide (CO) (chemical symbol)
- Care of (c/o) (postal code used for temporary address change)
- Central office (telecommunications and telephony)
- check out (co) (RCS command)
- co gender-neutral pronoun
- co- prefix (form of com-, signifying with, together, in conjunction, joint)
- Co (UIC classification of railroad locomotive wheel arrangement, known as 0-6-0 in the Whyte notation)
- Co (ethnicity), an ethnic group in Southeast Asia
- Cobalt (Co) (ferromagnetic metallic chemical element)
- Colombia (ISO 3166-1 country code)
- Colorado (CO) (U.S. postal abbreviation)
- Commanding officer (CO) (military)
- Company (Co.) (general business abbreviation)
- Conscientious objector (military)
- Continental Airlines (IATA airline code)
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