- CO stands for Company
- CO stands for Call-Out
- CO stands for Colombia
- CO stands for Change Order
- CO stands for Central Office (telecommunications/telephony)
- CO stands for Course
- C/O stands for Courtesy Of
- C/O stands for Cut Out
- CO stands for Cash Out (mortgage refinancing)
- CO stands for County
- CO stands for Conference
- CO stands for Current Operations
- CO stands for Chief Officer
- CO stands for Checkout
- CO stands for Command
- CO stands for Cabinet Office
- CO stands for Colorado (US postal abbreviation)
- CO stands for Como (Lombardia, Italy)
- C/O stands for Care of
- CO stands for Colton (blood group)
- C/O stands for Class Of
- CO stands for Certificate of Origin
- CO stands for Controlling
- CO stands for Community Organizer (Philippines)
- CO stands for Compliance
- CO stands for Chill Out
- CO stands for Connection Oriented
- CO stands for Combat (game, Natural Selection)
- CO stands for Community Outreach
- CO stands for Cellular One
- CO stands for Complain Of
- CO stands for crude oil
- CO stands for Charlotte Observer (newspaper)
- CO stands for Compliance Officer
- CO stands for Cardiac Output
- CO stands for Cobalt
- CO stands for Colchester (postcode, United Kingdom)
- C/O stands for Checkout
- CO stands for Commanding Officer
- CO stands for Certificate of Occupancy
- CO stands for Conan O’Brien
- CO stands for Carbon Monoxide
- CO stands for Correctional Officer
- CO stands for Communications Officer
- CO stands for Castor Oil
- CO stands for Colonial Office (UK)
- CO stands for Cargo Operations
- CO stands for Commissioned Officer
- CO stands for Compliance Order
- CO stands for Captain Obvious
- CO stands for Cutoff
- CO stands for Chinese Orchestra
- CO stands for Compañía (Spanish)
- CO stands for Cornish (linguistics)
- CO stands for Continental Airlines (airline code)
- CO stands for Correction Officer
- C/O stands for Consist Of
- CO stands for Clinical Operations
- CO stands for Covert Operations (gaming)
- CO stands for Clean Out (sewers/drains)
- CO stands for Combinatorial Optimization (workshop)
- CO stands for Contracting Officer
- CO stands for Cash Order
- CO stands for Consent Order
- CO stands for Conscientious Objector
- CO stands for Corporación (Spanish)
- CO stands for Certifying Officer
- CO stands for Combined Operations (gaming)
- CO stands for Clerical Officer (obsolete, now AO)
- CO stands for Collection Officer
- CO stands for Clothes Optional
- C/O stands for Cutoff
- C/O stands for Change-Over
- CO stands for Champions Online (game)
- CO stands for Constant Observation (medical care)
- CO stands for Command Output
- C/O stands for Closeout
- C/O stands for Call Out
- CO stands for Circle Officer (India)
- CO stands for Core Operation(s)
- C/O stands for Change-Order
- C/O stands for Carryover (funds)
- C/O stands for Complains Of (medical)
- CO stands for Clinical Officer (hospital)
- CO stands for Command Operations
- CO stands for Commitment to Perform (common feature; Capability Maturity Model Integration)
- CO stands for Chief Operator
- C/O stands for Certificate of Origin
- CO stands for Consoleone (Novell GUI)
- CO stands for Cargo Oil
- CO stands for Combinatorics and Optimization (field of pure mathematics)
- CO stands for Contracting Official
- CO stands for Convert Out
- CO stands for Consumer Ombudsman (UK)
- CO stands for Conservation Operations
- CO stands for Conseiller d’Orientation (French)
- C/O stands for Current Office
- CO stands for Case Operations
- C/O stands for Current Offer (trading)
- CO stands for Certified Orthotist (ABC)
- CO stands for Columbia Orchestra (Ellicott City, MD)
- CO stands for Comitissa (Latin: Countess, Codices And Manuscripts)
- CO stands for Custodial Officer
- C/O stands for Changeout
- CO stands for Constraint Oriented
- CO stands for Chosen Overseer
- CO stands for Coastal Chart
- CO stands for Circuit Overseer (Jehovah’s Witnesses)
- CO stands for Caucasian Ovtcharka (dog breed)
- CO stands for Command Outpost
- CO stands for Captive Office (Nortel)
- CO stands for Consolidated Obligation
- CO stands for Air Post Official (Scott Catalogue prefix; philately)
- CO stands for Ciceronian Oration
- C/O stands for Contamination/Overpressure (NASA)
- CO stands for Combat Aptitude Area
- CO stands for Congregation of the Oratory, Oratorians (religious order)
- CO stands for Comercializadora de Occidente SA (Guatemala)
C/O