| RS&S | Receiving, Shipping, and Storage 
| Others |
| RSS | EPOC RESource Source File
| Others |
| RSS | Radar Support System
| Others |
| RSS | Radio Service Software
| Others |
| RSS | Radio Subsystem
| Others |
| RSS | Rail Security Service
| Others |
| RSS | Rail Surveillance Service
| Others |
| RSs | Rain Sensors
| Others |
| RSS | Rally Sprint Series
| Others |
| RSS | Random Shot Script
| Others |
| RSS | Range Safety Switch
| Others |
| RSS | Range Safety System
| Others |
| RSS | Rashtriya Swayamsevak Sangh
| Others |
| RSS | RDF (Resource Data Framework) Site Summary
| Others |
| RSS | RDF Site Summary
| Others |
| RSS | Reactants Supply System
| Others |
| RSS | Reactive Sulfur Species
| Others |
| RSS | Ready For Selfless Service
| Others |
| RSS | Ready Service Spares
| Others |
| RSS | Real Sailor Senshi
| Others |
| RSS | Real Simple Syndication
| Others |
| RSS | Real Slim Shady
| Others |
| RSS | Really Safe Solution
| Others |
| RSS | Really Simple Sniptools
| Others |
| RSS | Really Simple Syndication
| Others |
| RSS | Really Simplified Stuff
| Others |
| RSS | Really Simply Syndication
| Others |
| RSS | Rear Sonar System
| Others |
| RSS | Receive Side Scaling
| Others |
| RSS | Receive-Side Scaling
| Others |
| RSS | Received Signal Strength
| Others |
| RSS | Reception Support Statement
| Others |
| RSS | Recombination Signal Sequence
| Others |
| RSS | Recombination Signal Sequences
| Others |
| RSS | Record Streaming Seed
| Others |
| RSS | Recuperative Stability System
| Others |
| RSS | Red Sound Systems
| Others |
| RSS | Redlink System Settings
| Others |
| RSS | Reduced Space Symbology
| Others |
| RSS | Reference Services Section
| Others |
| RSS | Refusal to Stop on Signal
| Others |
| RSS | Regression Sum of Squares
| Others |
| RSS | Regulatory Support Staff
| Others |
| RSS | Relay Spam Stopper
| Others |
| RSS | Reliance Swayamsewak Sangh
| Others |
| RSS | Religious Studies Society
| Others |
| RSS | Reload Slash-Shot
| Others |
| RSS | Remote Sensing Science
| Others |
| RSS | Remote Sensing Systems
| Others |
| RSS | Remote Sensors Subsystem
| Others |
| RSS | Remote Site Subsystem
| Others |
| RSS | Remote Site Summary
| Others |
| RSS | Remote Slave Station
| Others |
| RSS | Remote Socket Server
| Others |
| RSS | Remote Standalone Secondary
| Others |
| RSS | Remote Start System
| Others |
| RSS | Remote Station Scanner
| Others |
| RSS | Remote Storage Service
| Others |
| RSS | Remote Storage System
| Others |
| RSS | Remote Subscriber Service
| Others |
| RSS | Remote Subscriber Stage
| Others |
| RSS | Remote Support Software
| Others |
| RSS | Remote Switch Subsystem
| Others |
| RSS | Remote Switching Site
| Others |
| RSS | Remote Switching Sites
| Others |
| RSS | Remote Switching System
| Others |
| RSS | Repetitive stress syndrome
| Others |
| RSS | Reporting Services Script
| Others |
| RSS | Resident Set Size
| Others |
| RSS | Residual Sum of Squares
| Others |
| RSS | Responsibility Safety System
| Others |
| RSS | Retail Sales Solutions
| Others |
| RSS | Reverse Sense Switch
| Others |
| RSS | Reverse Sensing System
| Others |
| RSS | Revised Statutes of Saskatchewan
| Others |
| RSS | Rib Structure Station
| Others |
| RSS | Rich Site Specification
| Others |
| RSS | Rich Site Summary
| Others |
| RSS | Rich Site Summary, RDF Site Summary, or Really Simple Syndication
| Others |
| RSS | Roach Support System
| Others |
| RSS | Road Safety and Simulation
| Others |
| RSS | Road Safety Strategy
| Others |
| RSS | Road Safety Support
| Others |
| RSS | Road Sensing Suspension
| Others |
| RSS | Road Sport Supply
| Others |
| RSS | Roadside Safety Services
| Others |
| RSS | Robotic Servicer System
| Others |
| RSS | Robotics Science and Systems
| Others |
| RSS | Rochester Subway (Rockdale, Sandow and Southern Railroad)
| Others |
| RSS | Rockdale Sandow and Southern Railroad Company
| Others |
| RSS | Roll Stability Support
| Others |
| RSS | Roll Stability System
| Others |
| RSS | Room Scheduling System
| Others |
| RSS | Root Server System
| Others |
| RSS | Root Sum Square
| Others |
| RSS | Root Sum Squared
| Others |
| RSS | Root-Sum-Square
| Others |
| RSS | Root-Sum-Squared
| Others |
| RSS | Roseires, Sudan
| Others |
| RSS | Rotating Service Structure
| Others |
| RSS | Rotational Speed Sensor
| Others |
| RSS | Route Selection Services
| Others |
| RSS | Routers, Servers, and Switches
| Others |
| RSS | Royal Scientific Society
| Others |
| RSS | Royal Statistical Society
| Others |
| RSS | Rumor Spreading Shop
| Others |
| RSS | Rumour Super Service
| Others |
| RSS | Rural Sociological Society
| Others |
| RSS | Russell-Silver Syndrome
| Others |
| RSS | Rutland Senior Secondary
| Others |