T minus zero means out of time.. This comes from a countdown convention used in by both the American military and NASA. Generally, it is used when counting down to a major event that will happen at a specific time. Mathematically, T is time, minus whatever amount of time is left until the event happens. If the News Years ball is dropping in 10 minutes, one could say The ball is dropping in T minus 10 minutes and counting!.
mouse, computer mouse (noun). a hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad. see more on Definitions.net Â». hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad.
Today, we use a keyboard and a mouse to give commands to the computer. DOS stands for Disk Operating System. Today, the term is used most often to describe the Microsoft Command Line Interface (CLI) common to many IBM compatibles. Command Line Interfaces provide the keyboard as the primary means for the user to interact with the operating system. The COMMAND.COM program is DOS's CLI.