| Acronym | Definition |
|---|
| RCO | Royal Concertgebouw Orchestra |
| RCO | Remote Communications Outlet |
| RCO | Recycling Council of Ontario (Canada) |
| Rco | Rickettsia Conorii |
| RCO | Royal College of Organists (UK) |
| RCO | Rear Commodore |
| RCO | Rifle Combat Optic (US DoD Marine Corps) |
| RCO | Regenerative Catalytic Oxidizer |
| RCO | Range Control Officer |
| RCO | Resident Coordinator's Office |
| RCO | Remote Control Option |
| RCO | Regional Compliance Officer |
| RCO | Range Conducting Officer |
| RCO | District Rear Commodore |
| RCO | Reusable Content Object |
| RCO | Radiation Control Office |
| RCO | Red Cod |
| RCO | Remote Computing Option |
| RCO | Reseller Channel Organization |
| RCO | Regimental Commanding Officer |
| RCO | Radar Control Operator |
| RCO | Revenue Cycle Outsourcing |
| RCO | Radar Control Officer |
| RCO | Rail Change Out (railway repair crew) |
| RCO | Residual Crude Oil |
| RCO | Rate Commitment Option (lending) |
| RCO | Relative Capacity Occupation |
| RCO | Requisition Control Office |
| RCO | Random Chance Occurrence (statistical deviations) |
| RCO | Risks, Challenges and Opportunities |
| RCO | Regional Co-ordination Office |
| RCO | Red de Carreteras de Occidente |
| RCO | Radio Communication Outlet |
| RCO | Regional Control Office |
| RCO | Reconfiguration Change Order |
| RCO | Request for Commercial Offering |
| RCO | Ravenna Community Orchestras (Ravenna, OH) |
| RCO | Retaliation Control Officer (Director of Human Resources) |
| RCO | Rockford Community Orchestra (Rockford, MI) |
| RCO | Reports Control Officer |