CO
CO, Co, co, .co, c/o may refer to:
- Co, the chemical symbol for the element cobalt
- Co., an abbreviation for Company
- Co., an abbreviation for County
- Carbon monoxide, the molecular formula of the toxic gas (also called carbonic oxide)
- C.O., post-nominal initials to identify members of the congregation of the Oratory of Saint Philip Neri
- .co, the Internet top-level domain for Colombia
- .co (second level), Internet second-level domain used to denote commercial organizations in many countries
- CO postcode area for Colchester, England
- Cardiac output, the volume of blood being pumped by the heart per time unit
- Central office, in telecommunications and telephony
- Certificate of occupancy, a legal document
- Certificate of origin, used in international trade
- Champions Online, an MMO Action/RPG game developed by Cryptic Studios
- Check out, a Revision Control System command
- Chemins de fer Orientaux - an Ottoman railway company.
- Chesapeake and Ohio Railway
- Chinese Orchestra
- Coccygeal nerve of the spinal cord
- Colombia, in various country codes
- Colonial Office, a former UK government department
- Colorado (United States postal abbreviation)
- Command (disambiguation)
- Commitment ordering or Commit ordering, a concurrency control (serializability) technique for databases and transactional systems
- Como, Lombardia, Italy
- Company (co.), a general business abbreviation
- Compliance officer, a title used by the Food and Drug Administration for agents charged with enforcing its policies
- Computer organization
- Conjure One, Canadian music artist
- Conquer Online, a MMORPG PC game
- Conscientious objector, military
- Continental Airlines, IATA airline designator
- Corsican language, according to ISO 639 alpha-1
- Cuboctahedron
People and official titles
Other
- "care of", used to address a letter when the letter must pass through an intermediary
- "complaining of", the Chief complaint in the medical record of a presenting patient
- "co", a prefix meaning coming together (co-operate, co-curricular activities, co-brother etc.)
- "c/o", an acronym used in MMORPGs, stands for: Current Offer
- "c/o", an acronym used in a medical history, stands for: "complaining of"
See also