Of the operating systems mentioned, this one is still in active development. Modern computing sees a variety of needs, with different operating systems to accommodate them. However, we can distill ...

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 ...

The application programs "talk" to the operating system. If application programs are moved to a different computing environment, they have to be converted to interface with a different operating ...