| RSI | R Slotted Iron 
| Others |
| RSI | R Street Institute
| Others |
| RSI | Race Services Incorporated
| Others |
| RSI | Rainbow Services Inc
| Others |
| RSI | Rallye Sport Injection
| Others |
| RSI | Random Section Interface
| Others |
| RSI | Rapid Sequence Induction
| Others |
| RSI | Rapid sequence induction anesthesia
| Others |
| RSI | Rapid Sequence Intubation
| Others |
| RSI | Rationalization, Standardization, and Interoperability
| Others |
| RSI | Reality Sets In
| Others |
| RSI | Really Sore Injury
| Others |
| RSI | Really Stellar Interviewing
| Others |
| RSI | Recognized System Integrator
| Others |
| RSI | Recording Sound Industry
| Others |
| RSI | Reflux Symptom Index
| Others |
| RSI | Refrigeration School Inc
| Others |
| RSI | Refrigeration Supply, Inc.
| Others |
| RSI | Regional Snowfall Index
| Others |
| RSI | Regional System Integrators
| Others |
| RSI | Registro Storico Innocenti
| Others |
| RSI | Relation Specific Investment
| Others |
| RSI | Relational Software Inc.
| Others |
| RSI | Relative Strength Index
| Others |
| RSI | Relative Strength Indicator
| Others |
| RSI | Renault Sonalika International
| Others |
| RSI | Renault Sport Injection
| Others |
| RSI | Repeated Strain Injury
| Others |
| RSI | Repetitive Solitaire Injury
| Others |
| RSI | Repetitive Strain Injuries
| Others |
| RSI | Repetitive Strain Injury
| Others |
| RSI | Repetitive Stress Injury
| Others |
| RSI | Repetitive Stupidity Injury
| Others |
| RSI | Requests for Supplemental Information
| Others |
| RSI | Requirement Services Interface
| Others |
| RSI | Requirements Service Interface
| Others |
| RSI | Research Science Institute
| Others |
| RSI | Reserved Sub-Inspector of Police
| Others |
| RSI | Residential Services Inc
| Others |
| RSI | Residual Self Image
| Others |
| RSI | Resource Services Incorporated
| Others |
| RSI | Resource Services, Incorporated
| Others |
| RSI | Resources, Screening, and Intelligence
| Others |
| RSI | Restaurant Solutions Inc
| Others |
| RSI | Restoration Services Inc
| Others |
| RSI | Restoration Specialists Inc
| Others |
| RSI | Retail Solutions Inc
| Others |
| RSI | Rethink Solutions, Inc.
| Others |
| RSI | Retirement Strategies Inc
| Others |
| RSI | Return and Schedule Information
| Others |
| RSI | Reusable Surface Insulation
| Others |
| RSI | Reused Source Instructions
| Others |
| RSI | Review of Scientific Instruments
| Others |
| RSI | Right Side Impact
| Others |
| RSI | Rigid Shape Interpolation
| Others |
| RSI | Rising Stars, Inc.
| Others |
| RSI | Road Safety Initiative
| Others |
| RSI | Road Safety Inspection
| Others |
| RSI | Road Safety Institute
| Others |
| RSI | Road Safety International
| Others |
| RSI | Road Side Interview
| Others |
| RSI | Road Sign Information
| Others |
| RSI | Road Status Information
| Others |
| RSI | Road Surface Information
| Others |
| RSI | RoadSide Interview
| Others |
| RSI | Roberts Space Industries
| Others |
| RSI | Rockwell Software Inc.
| Others |
| RSI | Rough Sleepers Initiative
| Others |
| RSI | Rs422 Serial Interface
| Others |
| RSI | Run Support Index
| Others |
| RSI | Runtime Schema Information
| Others |
| RSI | Rural Systemic Initiative
| Others |
| RSI | Rush Sexual Inventory
| Others |
| RSI | The Research Science Institute
| Others |