| Acronym | Definition |
|---|
| CCO➣Cancer Care Ontario (Canada) |
| CCO➣Chief Compliance Officer (corporate title) |
| CCO➣Cisco Connection Online (Cisco Systems) |
| CCO➣Chief Creative Officer (corporate title) |
| CCO➣Clear Channel Outdoor (various locations) |
| CCO➣Camp Chief Ouray (Granby, CO) |
| CCO➣Chief Credit Officer (banking) |
| CCO➣Chief Customer Officer (corporate title) |
| CCO➣Community College Outreach (various organizations) |
| CCO➣Common Course Outline (various schools) |
| CCO➣Cisco Connection Online |
| CCO➣Catalytic Converter |
| CCO➣Chief Commercial Officer |
| CCO➣Contract Commercial Organization (various companies) |
| CCO➣Cell Change Order (wireless communications) |
| CCO➣Chief Communications Officer (corporate title) |
| CCO➣Criminal Code Offenses (various locations) |
| CCO➣Central Coordinating Office (Center for Ocean Sciences Education Excellence) |
| CCO➣Chief of the Contracting Office (various government agencies) |
| CCO➣Continuous Cardiac Output |
| CCO➣Cytochrome C Oxidase |
| CCO➣Consultation Coordination Officer (various locations) |
| CCO➣Catholic Christian Outreach (Canada) |
| CCO➣Chief of Combat Operations (US Air Force) |
| CCO➣Citigroup Country Officer |
| CCO➣Clandestine Communist Organization |
| CCO➣College of Chiropractors of Ontario |
| CCO➣Coal Controller Organization (India) |
| CCO➣Centre de Communication de l'Ouest (French: Communication Center of the West) |
| CCO➣Close Combat Optic |
| CCO➣Chief Clinical Officer (healthcare) |
| CCO➣Certified Crane Operator |
| CCO➣Contract Change Order |
| CCO➣Community Corrections Officer |
| CCO➣Conservative Central Office (UK) |
| CCO➣Cyber Control Order (US Air Force) |
| CCO➣Contingency Contracting Officer |
| CCO➣Customer Care Online (software) |
| CCO➣Comptoir Change Opéra (French currency exchange office; est. 1955) |
| CCO➣Church Community Organization (Kansas City, MO) |
| CCO➣Current Controlled Oscillator |
| CCO➣Complex Contingency Operations |
| CCO➣Condemned: Criminal Origins (video game) |
| CCO➣Combat Cargo Officer |
| CCO➣Chief Carbon Officer |
| CCO➣Canadian Cadet Organizations |
| CCO➣Catholic Conference of Ohio (Columbus, Ohio) |
| CCO➣Central Control Officer |
| CCO➣Communauté de Communes d'Oyonnax (French: Community of Communes of Oyonnax; Oyonnax, France) |
| CCO➣Centre de Contrôle des Opérations (French: Operations Control Center; various companies) |
| CCO➣COMINT Channels Only |
| CCO➣Construction Council of Ontario (Union) |
| CCO➣Concord Chamber Orchestra (Milwaukee, WI) |
| CCO➣Chief Consulting Officer (corporate title) |
| CCO➣Crystal Controlled Oscillator |
| CCO➣Charlotte Civic Orchestra (Charlotte, NC) |
| CCO➣Chief of Combined Operations |
| CCO➣Can't Call Out |
| CCO➣Cópia de Carbono Oculta (Portuguese: Blind Carbon Copy) |
| CCO➣Customer Care Office |
| CCO➣Coastal Caribbean Oils & Minerals, Ltd (former stock symbol; now delisted) |
| CCO➣Circuit Control Officer |
| CCO➣Container Control Officer |
| CCO➣Continuity-Check Outgoing |
| CCO➣Circuit Control Office |
| CCO➣Canadian College of Organists |
| CCO➣Computer Center Operator |
| CCO➣Création Concept Optique (French eyeglass designer) |
| CCO➣Chief Control Officer |
| CCO➣Cercle des Compagnons d'Oniros (French: Oniros Fellowship Circle; gaming community) |
| CCO➣Circumpolar Coordination Office (University of the Arctic; Rovaniemi, Finland) |
| CCO➣Centre Catalan d'Oncologie (French: Catalan Oncology Center) |
| CCO➣Conception à Coûts Objectifs (French: Design to Cost Objectives; business methodology) |
| CCO➣Combat Control Officer (Canadian naval equivalent of USN TAO and Royal Navy PWO) |
| CCO➣Central Contracting Office |
| CCO➣Communications Collection Outstation |
| CCO➣Certified Court Officer (Deputy Sheriffs Association of Michigan) |
| CCO➣Centre de Conventions d'Oran (French: Oran Convention Center; Oran, Algeria) |
| CCO➣Cadet Chief Officer |
| CCO➣Classified Control Officer |
| CCO➣Compound Cycle Engine |
| CCO➣Christian Care Organization |
| CCO➣Canberra Community Orchestra (now renamed the National Capital Orchestra) |
| CCO➣Clinchfield Railroad Company |
| CCO➣Counterpoint Community Orchestra (Canada) |
| CCO➣Critical Compliance Objective |
| CCO➣Collapsed Central Office (Tachion Networks, Inc.) |
| CCO➣Computing Center Operations |
| CCO➣Claims Central Office (insurance) |
| CCO➣Communications Control Officer |