| Acronym | Definition |
|---|
| SET | Set (assembly language directive) |
| SET | Driver Set (file name extension) |
| SET | Stock Exchange of Thailand |
| SET | Science, Engineering and Technology |
| SET | Sony Entertainment Television |
| SET | Image Settings (file name extension) |
| SET | Special Education Technology |
| SET | Science Education and Technology |
| SET | Self-Employment Tax |
| SET | Secure Electronic Transaction |
| SET | Secondary Education Teaching |
| SET | Safety Education and Training |
| SET | Student Evaluation of Teaching (various schools) |
| SET | Self Evaluation Tool |
| SET | Self-Employment Training |
| SET | Single Embryo Transfer (fertility treatment) |
| SET | System Engineering Team |
| SET | Serotonin Transporter |
| SET | Software Engineering Technology |
| SET | Senior Executive Team |
| SET | Social Events Team (various organizations) |
| SET | Stora Enso Timber (Finland and Sweden) |
| SET | State Education Tax |
| SET | Single-Electron Transistor |
| SET | Social Exchange Theory |
| SET | Single Ended Triode (topology in tube amplifiers) |
| SET | Science and Engineering Technology (USACE) |
| SET | Safety Environment Technology |
| SET | Single Ended Terminated |
| SET | Self Expanding Trunk |
| SET | Sound Editing Tool |
| SET | Settings File |
| SET | Special Edition Turbo |
| SET | Security Enhancement Tool |
| SET | Sustainable Energy Technology (various organizations) |
| SET | Special Enforcement Team |
| SET | Société, Environnement, Territoire (French: Company, Environment, Land; laboratory) |
| SET | South Eastern Trains (UK) |
| SET | Source Evaluation Team (various organizations) |
| SET | Single-Electron Tunneling |
| SET | Single-Electron Transfer |
| SET | Secure Encryption Technology |
| SET | Scanner Enhancement Technology |
| SET | Southeast Toyota Distributors, LLC |
| SET | Secure Electronic Transaction LLC |
| SET | Secure Electronic Transfer |
| SET | Single Event Transient (electronics in space) |
| SET | Submarine Escape Training |
| SET | Similarity-Enhanced Transfer |
| SET | Society of Engineering Technologists |
| SET | Space Education Trust (UK; est. 1988) |
| SET | Senior Engineering Team |
| SET | Step Envelope Tracking (microwave theory) |
| SET | Skin Endpoint Titration |
| SET | Security Escort Team |
| SET | Laboratoire Systèmes et Transports (French: Laboratory Systems and Transport; Montbeliard, France) |
| SET | Space Environment Technologies |
| SET | Space Environment Testbed |
| SET | Institute for System Design Technology (GMD, Germany) |
| SET | Senior English Test (English as a foreign language qualification) |
| SET | Software Engineering Technician |
| SET | Specialized English Training |
| SET | Système Etude Technique (French: Technical Study System; educational technology company) |
| SET | Société d'Equipement de la Touraine (French: Touraine Development Company) |
| SET | System Embedded Training |
| SET | Student Education and Training Plans |
| SET | Sciences de l'Environnement Terrestre (French: Environmental Land Science) |
| SET | Standard d'Echange et de Transfer |
| SET | Situational Emergency Training |
| SET | Simultaneous Engineering Technology |
| SET | Simple End-point Terminal (H.323) |
| SET | Solar Energy Thermionic (JPL program) |
| SET | System Engineering Testbed |
| SET | Special Evaluation Tests |
| SET | Skills Evaluator Trainer |
| SET | Seal Encoding Technology (anti-fraud technology from EnSeal Systems Ltd.) |
| SET | Sanctuary Enforcement Team |
| SET | Synchronous Encodings in Tandem |
| SET | Social Enrichment Training |
| SET | Squad Engagement Trainer |
| SET | Selective Electronic Test |
| SET | Superconducting Electronically Tunable |
| SET | St Charles, Mo - St Charles County Smartt Airport |