| RCS | Race Car Show 
| Others |
| RCS | Racing Clutch System
| Others |
| RCS | Rack Correction System
| Others |
| RCS | Radar Cross-Section
| Military, Air Force, Defence, Weapon, Technology, Satellite Technology, Transport, Aircraft |
| RCS | Radcliffe Choral Society
| Others |
| RCS | Radial Clutch Master Cylinder
| Others |
| RCS | Radio Cluster Server
| Others |
| RCS | Radio Communications System
| Others |
| RCS | Radio Conference Subcommittee
| Others |
| RCS | Radio Cross Section
| Others |
| RCS | Rain City Subies
| Others |
| RCS | Random Capitalization Syndrome
| Others |
| RCS | Rantoul City Schools
| Others |
| RCS | Rapid Convenience Surveys
| Others |
| RCS | Rate Control Scheme
| Others |
| RCS | Ratio Click System
| Others |
| RCS | Ravena Coeymans Selkirk
| Others |
| RCS | Ray Cammack Shows
| Others |
| RCS | Raytheon Cyber Services
| Others |
| RCS | Reaction Control System
| Technology, Space Travel, Spacecraft |
| RCS | Reactive Chemical Species
| Others |
| RCS | READ classification system Informatics
| Others |
| RCS | Reading, Consultation, and Study
| Others |
| RCS | ReAgent Chemical Services
| Others |
| RCS | Real Communication Solution
| Others |
| RCS | Real Communication Solutions
| Others |
| RCS | Real Company Stuff
| Others |
| RCS | Real Compton Scattering
| Others |
| RCS | Really Contrived Story
| Others |
| RCS | Really Crappy Support
| Others |
| RCS | Realtime Control System
| Others |
| RCS | Realtime Control Systems
| Others |
| RCS | Rear Coil Spring
| Others |
| RCS | Reasonable Cleaning Services
| Others |
| RCS | Recombinant Congenic Species
| Others |
| RCS | Record Size
| Others |
| RCS | Records Control Schedule
| Others |
| RCS | Records Control Schedules
| Others |
| RCS | Recovery Control System
| Others |
| RCS | Red Cedar Speedway
| Others |
| RCS | Red Cell Suspension
| Others |
| RCS | Red Cherry Shrimp
| Others |
| RCS | Red Crescent Societies
| Others |
| RCS | Red Crescent Society
| Others |
| RCS | Reduction Catalytique Selective
| Others |
| RCS | Redwood Christian Schools
| Others |
| RCS | Reference Color Space
| Others |
| RCS | Refrigerated Construction Service
| Others |
| RCS | Regimental Combat Support
| Others |
| RCS | Regional Connectivity Scheme
| Others |
| RCS | Registered Cardiac Sonographer
| Others |
| RCS | Regulations Coordination Staff
| Others |
| RCS | Relational Calculus Subset
| Others |
| RCS | Relative Configuration Space
| Others |
| RCS | Religious Community Services
| Others |
| RCS | Reloadable Control Storage
| Others |
| RCS | Remote Cache Server
| Others |
| RCS | Remote Computer System
| Others |
| RCS | Remote Computing Service
| Others |
| RCS | Remote Control System
| Others |
| RCS | Renaissance Cooking Systems
| Others |
| RCS | Rensselaer Computing System
| Others |
| RCS | Repeat Caesarean Section
| Others |
| RCS | Replacement Cost Study
| Others |
| RCS | Report Control Symbol
| Others |
| RCS | Representative Child Sponsorship
| Others |
| RCS | Repubblica Comunista Salzese
| Others |
| RCS | Requirements Computation System
| Others |
| RCS | Research Collaboration System
| Others |
| RCS | Residence and Catering Services
| Others |
| RCS | Residential Classification Scale
| Others |
| RCS | Residential Classification Scheme
| Others |
| RCS | Resilient Composite System
| Others |
| RCS | Resource Construction Set
| Others |
| RCS | Resource Control System
| Others |
| RCS | Respirable Crystalline Silica
| Others |
| RCS | Respiratory Care Services
| Others |
| RCS | Retail Credit Solutions
| Others |
| RCS | Reticulum Cell Sarcoma
| Others |
| RCS | Retirement Community Specialists
| Others |
| RCS | Retirement Confidence Survey
| Others |
| RCS | Retro Classics Stuttgart
| Others |
| RCS | Return Channel System
| Others |
| RCS | Revision Control Software
| Others |
| RCS | Revision Control System
| Others |
| RCS | Rich Communication Service
| Others |
| RCS | Rich Communication Services
| Others |
| RCS | Rich Communication Suite
| Others |
| RCS | Rich Communications Services
| Others |
| RCS | Rich Communications Suite
| Others |
| RCS | Richmond Community Schools
| Others |
| RCS | Ride Control Suspension
| Others |
| RCS | Ride Control System
| Others |
| RCS | River Cities Speedway
| Others |
| RCS | Riverfront Camaro Show
| Others |
| RCS | Road Calibration Suspension
| Others |
| RCS | Roadster Club Scandinavia
| Others |
| RCS | Roanoke County Schools
| Others |
| RCS | Robust Cargo Suspension
| Others |
| RCS | Rochester Catholic Schools
| Others |
| RCS | Rochester Community Schools
| Others |
| RCS | Rochester Computer Society
| Others |
| RCS | Rockbridge Choral Society
| Others |
| RCS | Rockford Christian School
| Others |
| RCS | Rockingham County Schools
| Others |
| RCS | Roll Control Suspension
| Others |
| RCS | Roller Coaster Syndrome
| Others |
| RCS | Roof Consulting Services, Inc.
| Others |
| RCS | Ross Career Services
| Others |
| RCS | Roxboro Community School
| Others |
| RCS | Royal College of Surgeons
| Others |
| RCS | RPG Creation System
| Others |
| RCS | Rudder Control System
| Others |
| RCS | Runflat Component System
| Others |
| RCS | Rural Clinical School
| Others |
| RCS | Russellville City Schools
| Others |
| RCS | Rutherford County Schools
| Others |
| RCS | Ryan Computer Services
| Others |
| RCS | The Royal College of Surgeons of England
| Others |