| Acronym | Definition |
|---|
| RSI | Relative Strength Index |
| RSI | Repetitive Strain Injury |
| RSI | Régime Social des Indépendants |
| RSI | Repetitive Stress Injury |
| RSI | Roofing/Siding/Insulation (magazine) |
| RSI | Radarsat International |
| RSI | Rapid Sequence Intubation |
| RSI | Required Supplementary Information (financial statements) |
| RSI | R-value (thermal resistance) Système International |
| RSI | Relative Strength Indicator |
| RSI | Rapid Sequence Induction |
| RSI | Rice Space Institute (Rice University) |
| RSI | Research Science Institute |
| RSI | Religious Science International (Science of Mind) |
| RSI | Radio Slovakia International |
| RSI | Remotely Sensed Imagery |
| RSI | rationalization, standardization, and interoperability (US DoD) |
| RSI | Radio Satellite Integrators, Inc. |
| RSI | Recherche en Soins Infirmiers (journal) |
| RSI | Roadside Interview (transport survey method) |
| RSI | Residual Self-Image (The Matrix) |
| RSI | Retirement and Survivors Insurance (Social Security Administration) |
| RSI | Reusable Surface Insulation |
| RSI | Recycling Services Inc |
| RSI | Resolution Systems Institute (Chicago, IL) |
| RSI | Remote Site Incubator (fish hatchery) |
| RSI | Request for Supplemental Information |
| RSI | Remote Surface Inspection |
| RSI | Rockwell Software Inc. |
| RSI | Research Summer Institute (MIT) |
| RSI | Resource Systems Institute |
| RSI | Radiation Solutions Inc. (Mississauga, Ontario, Canada) |
| RSI | Road Safety International |
| RSI | Repubblica Sociale Italian (Italian: Fascist Italian Republic, Salò, Italy) |
| RSI | Recovery Systems International (Charlotte, NC) |
| RSI | Radiation Status Indicator |
| RSI | Remote Status Indicator |
| RSI | Resources Systems Inc |
| RSI | Replication Server Interface |
| RSI | Radial Scientific Instrument |
| RSI | Replacement Stream Input |
| RSI | Record Status Indicator |
| RSI | Radar Sensitivity Improvement |
| RSI | Rajendra Singh - Institute |
| RSI | Requirement Services Interface (testing methodology for use case analysis) |
| RSI | Receipt, Storage, & Issue |
| RSI | Request Service Initiation Message (FIPS) |
| RSI | Rick Stanley, Inc (New York, NY) |
| RSI | Reel Start Institute |
| RSI | Related Standardization Interoperability |
| RSI | Reliance Surety & Insurance Company, Inc. (Manilla) |
| RSI | Radiological Systems, Inc. |