| Acronym | Definition |
|---|
| EST | Eastern Standard Time (GMT-0500) |
| EST | Established |
| EST | Estimated |
| EST | Estimate |
| EST | Environmentally Sustainable Transport |
| EST | Erhard Seminar Training (Werner Erhard) |
| EST | Energy Saving Trust (UK) |
| EST | Estimation |
| EST | Estimated Value (used in auctions) |
| EST | Estonia |
| EST | Estonian (language) |
| EST | Estates |
| EST | Esther |
| EST | Expressed Sequence Tag |
| EST | Electronic Systems Technician (job title) |
| EST | Environmental Science and Technology |
| EST | Electronic Shipping Tools (Canada Post) |
| EST | Escola Superior de Tecnologia (Portugal) |
| EST | Environmentally Sound Technologies |
| EST | Esbjörn Svensson Trio (Sweden) |
| EST | Electroshock Therapy |
| EST | English for Science and Technology (various schools) |
| EST | Energy Saving Technology |
| EST | Electronic Sell-Through |
| EST | Electrical Safety Testing |
| EST | Engagement Skills Trainer |
| EST | Emergency Support Team |
| EST | Exercise Stress Test (aka treadmill test) |
| EST | European Society for Translation Studies |
| EST | Executive Steering Committee |
| EST | Electronic Spark Timing (GM) |
| EST | Encefalopatie Spongiformi Trasmissibili (Italian: Bovine Spongiform Encephalopathy) |
| EST | Exercise Study (EU, UN) |
| EST | Emergency Services Team |
| EST | Endoscopic Sphincterotomy |
| EST | Electrical Safety Test (band) |
| EST | Elevated Storage Tank |
| EST | Emitter Switched Thyristor |
| EST | Edwards Systems Technologies (GE Security) |
| EST | Evaluation Summary Table |
| EST | Enlisted Specialty Training |
| EST | Essential Subjects Training |
| EST | Equal Spin Temperature |
| EST | Equipment Status Telemetry |
| EST | Enfermedad Sexualmente Transmisible (Spanish: sexually transmitted disease) |
| EST | Enlisted Screening Test |
| EST | Educational School Tours, Inc. |
| EST | Electronic Security Tactical (US military) |
| EST | Engineering Screening Team |
| EST | Enroute Support Team |
| EST | Environmental System Test |
| EST | Evolutionary Structural Testing |
| EST | Electronic Shelf Tag |
| EST | Enterprise Support Technician (Microsoft) |
| EST | Ensemble Studio Theatre (various locations) |
| EST | Enterprise Software Technology |
| EST | Engineering, Sciences and Technology (various organizations) |
| EST | Estimated Starting Time |
| EST | Employee Share Trust |