| Acronym | Definition |
|---|
| TRS | Terminology Reference System (US EPA) |
| TRS | Teacher Retirement System |
| TRS | Total Return Swap |
| TRS | Telecommunications Relay Service (FCC) |
| TRS | Tandy-Radio Shack (Tandy Corporation) |
| TRS | Tip, Ring, Sleeve (phone connector) |
| TRS | Telangana Rashtra Samithi (India) |
| TRS | Trainz Railroad Simulator (game) |
| TRS | Training Squadron |
| TRS | TRICARE Reserve Select (US DoD healthcare plan) |
| TRS | Technical Report Server |
| TRS | Term Rewriting System |
| TRS | Total Reduced Sulfur |
| TRS | Taxable REIT Subsidiary |
| TRS | Tourist Refund Scheme (Australia) |
| TRS | Telephone Relay Service |
| TRS | Total Return to Shareholders |
| TRS | The Rocket Summer (band) |
| TRS | Tactical Reconnaissance Squadron |
| TRS | Trunked Radio System |
| TRS | Taux de Rendement Synthétique (French: Overall Equipment Effectiveness) |
| TRS | Technology Reference Study (ESA) |
| TRS | Training Specialist |
| TRS | Time Resolved Spectroscopy |
| TRS | Transaction Reporting System |
| TRS | Transverse Rupture Strength |
| TRS | The Registration System |
| TRS | Airtran Airlines (airline code) |
| TRS | Trieste, Italy - Ronchi Dei Legionari (Airport Code) |
| TRS | Trade Registration System |
| TRS | Taoist Restoration Society |
| TRS | Testicular Regression Syndrome |
| TRS | Terrain Response System (automotive system) |
| TRS | Technical Rate-of-Substitution (aka marginal rate of technical substitution, MRTS) |
| TRS | This Really Sucks |
| TRS | Tracking and Reporting System |
| TRS | Tactical Reconnaissance System |
| TRS | Trouble Reporting System (Sprint) |
| TRS | Tough Rubber Sheathed (cables used in lighting) |
| TRS | Training Resource Strategy |
| TRS | Technical Requirements Specification |
| TRS | Toxicology Regulatory Services, Inc. |
| TRS | Technical Repair Standard |
| TRS | Top-Ranking Sentences (information access) |
| TRS | Target Recognition System |
| TRS | Thermal Radiation Simulator |
| TRS | Time Reference Signal |
| TRS | Tax Reporting System |
| TRS | Task Requirement Sheet |
| TRS | The Rice School (Houston, Texas) |
| TRS | Temporary Roof Support |
| TRS | Test Requirement Specification |
| TRS | Tactical Receive Segment |
| TRS | Thermal Radiation Source |
| TRS | Texas Racing Scene (website) |
| TRS | Tactile Ring Signaler |
| TRS | Transportation Railway Service |
| TRS | Threat Response System |
| TRS | Test Record Sheet |
| TRS | Thermal Reflector System |
| TRS | Transmission Repeater Station |
| TRS | Technical Research Ship |
| TRS | ThalesRaytheonSystems Company |
| TRS | Transcript Research System |
| TRS | Tubular Round Slings |
| TRS | Traffic Routing System |
| TRS | Training, Readiness, and Simulation |
| TRS | Total Risk Score (myocardial infarction patients) |
| TRS | Thermal Residue Stress |
| TRS | Technical/Maintenance, Overhaul and Repair Standard |
| TRS | Threaded Rod Support |
| TRS | The Rape Squad (gaming clan) |
| TRS | Topocentric Reference System |
| TRS | Total Remote Site |
| TRS | Transportable Relay Station |
| TRS | Trumpton Riot Squad (UK gaming clan) |
| TRS | Technical Requirements Statements (Sprint) |
| TRS | Topology and Routing Services |
| TRS | Text Resident Set |
| TRS | Tyre Repair System |
| TRS | Transmitter |
| TRS | Tcp Rate Shaping |
| TRS | Testarossa |
| TRS | Trouble Shooter |