| Acronym | Definition |
|---|
| RCO | Regional Contracting Office (US Marines) |
| RCO | Ratio of Correct Object |
| RCO | Remote Control |
| RCO | Registration Confirmation |
| RCO | Remote Communications Outlet |
| RCO | Royal Concertgebouw Orchestra |
| RCO | Rifle Combat Optic (US DoD Marine Corps) |
| RCO | Responsible Corporate Officer (criminal law doctrine) |
| RCO | Recycling Council of Ontario (Canada) |
| RCO | Royal College of Organists (UK) |
| RCO | Retraite Complémentaire Obligatoire (French: Additional Mandatory Retirement) |
| RCO | Risk Control Option |
| RCO | Rifle Company |
| RCO | Regenerative Catalytic Oxidizer |
| RCO | Regulatory Compliance Officer (various organizations) |
| RCO | Reverse Chronological Order |
| RCO | Readiness Control Officer (US Navy) |
| RCO | Relative Contact Order (biology) |
| RCO | Remote Control Office (US Navy) |
| RCO | Rear Commodore |
| RCO | Range Conducting Officer |
| RCO | Research Compliance Officer (US VA) |
| RCO | Resident Coordinator's Office |
| RCO | Range Control Officer |
| RCO | Residential Communities Office (US Army) |
| RCO | Radio Communications Operator (various organizations) |
| RCO | Red de Carreteras de Occidente |
| RCO | Regional Compliance Officer |
| RCO | Rickettsia Conorii |
| RCO | District Rear Commodore |
| RCO | Revenue Cycle Outsourcing |
| RCO | Remote Control Option |
| RCO | Red Cod |
| RCO | Real Combat Online (martial arts) |
| RCO | Reseller Channel Organization |
| RCO | Rugby Club Orléans (French rugby club) |
| RCO | Reusable Content Object |
| RCO | Remote Computing Option |
| RCO | Radiation Control Office |
| RCO | Radar Control Operator |
| RCO | River Cow Orchestra (Kansas City, MO) |
| RCO | Racing Cars Organisation (Belgium) |
| RCO | Radar Control Officer |
| RCO | Rail Change Out (railway repair crew) |
| RCO | Regimental Commanding Officer |
| RCO | Rate Commitment Option (lending) |
| RCO | Relative Capacity Occupation |
| RCO | Rencontres de Chimie Organique (French: Organic Chemistry Meeting) |
| RCO | Requisition Control Office |
| RCO | Radio Communication Outlet |
| RCO | Reconfiguration Change Order |
| RCO | Regional Co-ordination Office |
| RCO | Risk & Control Officer (various companies) |
| RCO | Reading Comedy Outlet (Wyomissing, PA) |
| RCO | Request for Commercial Offering |
| RCO | Reactive Carbonyl Compound |
| RCO | Ravenna Community Orchestras (Ravenna, OH) |
| RCO | Retaliation Control Officer (Director of Human Resources) |
| RCO | Rockford Community Orchestra (Rockford, MI) |
| RCO | Residual Crude Oil |
| RCO | Random Chance Occurrence (statistical deviations) |
| RCO | Regional Control Office |
| RCO | Reports Control Officer |
| RCO | Risks, Challenges and Opportunities |
