Boot

English (en)

Boot
To boot (to boot up, to start up or 
booting) a computer is to load an 
operating system (OS) into the 
computer's main memory or RAM. Once 
the OS is loaded (for example, on a 
PC, you will see the initial Windows 
or Mac desktop screen), it's ready 
for users to run applications.

The term boot describes the process 
taken by the computer when turned on 
that loads the operating system and 
prepares the system for use.