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 ...

The computer's master control program. 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 ...

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 ...

An operating system that is designed to work in a computer that processes 64 bits at a time. Most personal computers today are 64-bit, and mobile devices are expected to begin using 64-bit CPUs in ...