| Acronym | Definition |
|---|
| RCS | Report(s) Control Symbol |
| RCS | Revision Control System |
| RCS | Royal College of Surgeons |
| RCS | Radar Cross Section |
| RCS | Registre du Commerce et des Sociétés (France business registry) |
| RCS | Reaction Control System |
| RCS | Royal Commonwealth Society (UK) |
| RCS | Reactor Coolant System |
| RCS | Remote Control System |
| RCS | Retirement Confidence Survey |
| RCS | Residential Care Services |
| RCS | Reaction Control Subsystem |
| RCS | Rapid Cycling Synchrotron |
| RCS | Resident Classification Scale (Australian Department of Health and Aging) |
| RCS | Red Crescent Society |
| RCS | Rich Communication Suite |
| RCS | Red Cross Society |
| RCS | Return Channel System |
| RCS | Radio Corporation of Singapore |
| RCS | Registered Cardiac Sonographer |
| RCS | Recruiting Squadron |
| RCS | Radio Communications System |
| RCS | Revenue Cutter Service (precursor to US Coast Guard) |
| RCS | Royal College of Science (Imperial College London) |
| RCS | Regulatory Compliance Services |
| RCS | Readchars (Hyper Logo Turtle graphics command) |
| RCS | Records Communications Switching System |
| RCS | Riverdale Country School (Bronx, New York) |
| RCS | Resource Control System |
| RCS | Roll Control System (Aerospace) |
| RCS | Resource-Constrained Scheduling |
| RCS | Radio Conference Subcommittee |
| RCS | Racing Club Strasbourg (France) |
| RCS | Royal Corps of Signals |
| RCS | Russian Chemometrics Society |
| RCS | Rectangular Coordinate System |
| RCS | Rose City Software |
| RCS | Richmond Christian School |
| RCS | Range Control Squadron |
| RCS | Rehoboth Christian School (Gallup, NM) |
| RCS | Requirement Control Symbol |
| RCS | Regional Crime Squad |
| RCS | Rudder Control System |
| RCS | Renaissance Charter School |
| RCS | Reports Control System |
| RCS | Risk Control System (process safety) |
| RCS | Rehabilitation Center of Sheboygan (Sheboygan, WI) |
| RCS | Requirements Computation System |
| RCS | Reserved-Channel Scheme |
| RCS | Resource Compliance Specialist (Education) |
| RCS | Rehabilitation Consulting and Services |
| RCS | Rotating Coordinate System |
| RCS | Royal Certified Service (Royal Bank, Canada) |
| RCS | Re-Certification Scheme (UK) |
| RCS | Routing Control Service |
| RCS | Remote Channel Selector |
| RCS | Reactor Containment System |
| RCS | Respiratory Care Specialist |
| RCS | Rockford Christian School (Illinois) |
| RCS | Radar Countermeasures System |
| RCS | Radio Cluster Server |
| RCS | Regional Co-ordination Service |
| RCS | Regional Control of Shipping |
| RCS | Ranger Computer Systems Ltd. (UK) |
| RCS | Regional Core Switch |
| RCS | Right Control Strategy |
| RCS | Regulated Commodity Service |
| RCS | Registered Counselor Supervisor |
| RCS | Runway Control Structure |
| RCS | Reserve Component Site |
| RCS | Republic of China Ship |
| RCS | Remote Controller Switch |
| RCS | Reedsburg Cab Service (Reedsburg, WI) |
| RCS | Relative Consistent System |
| RCS | Radio Communications Supplement (newsletter; IEEE) |
| RCS | Roade Community Orchestra (UK) |