1. An operating system is a set of programs that lies between applications software and the computer hardware.
2. The supervisor program is the most important operating system program because it controls the entire operating system.
3. Programs which remain in memory are resident ones. Programs which are loaded into memory from disk storage only as needed are called nonresident ones.
4. An operating system has three main functions: (1) manage the computer's resources, (2) establish a user interface, and (3) execute and provide services for applications software.
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1. An operating system is a set of programs that lies between applications software and the computer hardware.
2. The supervisor program is the most important operating system program because it controls the entire operating system.
3. Programs which remain in memory are resident ones. Programs which are loaded into memory from disk storage only as needed are called nonresident ones.
4. An operating system has three main functions: (1) manage the computer's resources, (2) establish a user interface, and (3) execute and provide services for applications software.