•
Madison Symmetric Torus, a plasma experiment at the University of Wisconsin–Madison, US •
Magnetic secure transmission, whereby a smartphone mimics a payment card's magnetic stripe •
Magnetic seizure therapy, a form of electrotherapy and electrical brain stimulation •
Mean sidereal time •
Medial superior temporal area, of the primate brain •
Measurement Science and Technology, an academic journal •
Microscale thermophoresis, moving particles in a microthermal gradient •
Micro systems technology, of micromachines •
Mobile service tower, a movable tower to provide services for a rocket launch •
Multiple scattering theory Computing •
Minimum spanning tree, in graph theory •
.mst, a file extension of Microsoft Windows Installer •
Multiple Spanning Tree Protocol, for computer networks •
Multi-Stream Transport, multiple displays on a single DisplayPort connector ==Time zones==