STM
- Belkin
- Canon EF lens mount
- Dance Dance Revolution 5thMix
- International Association of Scientific, Technical, and Medical Publishers
- Master of Sacred Theology
- Microsoft Exchange Server
- ST"M
- ST1M
- STEM fields
- STM (Turkish company)
- STM-1
- STM32
- STMicroelectronics
- Santarém-Maestro Wilson Fonseca Airport
- Scanning tunneling microscope
- Science Translational Medicine
- Science, technology, and medical publishing
- Scream Tracker
- Sea traffic management
- Server Side Includes
- Short-term memory
- Signature-tagged mutagenesis
- Small Tactical Munition
- Société de transport de Montréal
- Software transactional memory
- Space traffic management
- St Michaels railway station
- St Thomas College of Engineering and Technology
- St. Thomas More College
- St. Thomas More Collegiate
- St. Thomas Mount railway station
- Stabilisation Tracking Mechanism
- Stamford Transportation Center
- Stepper motor
- Sydney Tramway Museum