When a computer is turned on, a small "boot program" loads the operating system. Although additional system modules may be loaded as needed, the main part, known as the "kernel" resides in memory ...

An operating system is a collection (or suite) of programs that manages and controls the computer. Operating systems have many functions: A user interface is a program, or suite of programs that ...

Users control the computer by typing in commands ... They still exist within modern operating systems, for example the command prompt app in Windows, and Terminal in macOS. Line 2 lists the ...