MSTSC stands for Microsoft Terminal Services Client. “Terminal Services” these days is more commonly referred to as “Remote Desktop” but you can kind of understand where “Terminal Services” came from if know that years ago a monitor and keyboard combinations that did nothing used to be called “Dumb Terminals.” The “Client” part in Terminal Services Client is just referring to the program that runs on your machine (see image).
There is a corresponding program that is the Microsoft Terminal Services “Server” that the client talks to that is running on the remote machine you’re connecting to.
For those that don’t know why someone would even be asking this question, you can quickly launch a new remote desktop session by clicking Start -> Run and typing “mstsc”
by Michael Adamission
Originally published at https://www.precisioninfinity.com on October 9, 2014.