| Acronym | Definition |
|---|
| TEM | Transmission Electron Microscope |
| TEM | Transmission Electron Microscopy |
| TEM | Telecom Expense Management |
| TEM | Työ-Ja Elinkeinoministeriön (Finnish: Labor and Industries Ministry) |
| TEM | Technology for Emerging Markets |
| TEM | Transverse Electromagnetic |
| TEM | Test Emulator Module |
| TEM | Telecommunication Equipment Manufacturer |
| TEM | Turbo Editor Macro |
| TEM | Trap Enable Mask |
| TEM | Template File |
| TEM | Trap Enable Modes |
| TEM | Telefonica Moviles (Spain, Mobile Phone Operator) |
| TEM | Tivoli Endpoint Manager (IBM Corp.) |
| TEM | Transanal Endoscopic Microsurgery |
| TEM | Taukay Edizioni Musicali (Italian: Taukay Musical Editions) |
| TEM | Transient Electromagnetic |
| TEM | Terrestrial Ecosystem Model |
| TEM | Threat and Error Management (aviation safety) |
| TEM | Transverse Electromagnetic Mode |
| TEM | Trial-and-Error Method |
| TEM | Test for English Majors |
| TEM | Transactions on Engineering Management (journal; IEEE) |
| TEM | Trans-European Motorway |
| TEM | Trans European Motorway |
| TEM | Time Exceeded Message (computing) |
| TEM | Thermal Energy Machining (deburring machine) |
| TEM | Technical Exchange Meeting |
| TEM | Technical Error of Measurement |
| TEM | Telecom Equipment Manufacturer |
| TEM | Tunneling Electron Microscopy |
| TEM | The Extensions Mirror (software) |
| TEM | Triethylene Melamine |
| TEM | Trusted Enterprise Manager (Master Design) |
| TEM | Target Exploration and Mining (Wyoming) |
| TEM | Technical Evaluation Meeting |
| TEM | Tohoku Electric Manufacturing (Tokyo, Japan) |
| TEM | Total Environmental Management Ltd. (UK) |
| TEM | Texas Certified Emergency Manager |
| TEM | Texas Episodic Model |
| TEM | Terrain Evaluation Module |
| TEM | Tanaka Electronics Malaysia (various locations) |
| TEM | Travaux Electriques du Midi (French: Midi Electric Works; France) |
| TEM | Total Environmental Management, Inc. (Anaheim, CA) |
| TEM | Target Engagement Message |
| TEM | Thermoelectric Electromagnetic |
| TEM | Traffic Engineering Module (Nextone) |
| TEM | Temiskaming and Northern Idaho Railroad (aka T&NI) |
| TEM | Transmission Electronique Mécanique (French: Transmission Electronics Mechanics; France) |
| TEM | Technology Exchange Meeting |
| TEM | Technical Evaluation Management |
| TEM | Test Evaluation Matrix |
| TEM | Test Efficiency Metric |
| TEM | Training Equipment Monitor (name of person who monitors the equipment used for training) |
| TEM | Time Elapse Meter |
| TEM | Turbine Engine Manufacturing Company (Iran) |
| TEM | Test Equipment Matrix |