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What are the main functions of operating system PDF? · Security – · Control over system performance – · Job accounting – · Error detecting aids – (a) explain the need for the following functions of an operating system: user interface, memory management, peripheral management, multitasking and security. Computer system can be divided into four components: – Hardware – provides basic computing resources. • CPU, memory, I/O devices. – Operating system. The operating system is a set of special programs that run on a computer system that allows it to work properly. It performs basic tasks such as recognizingChapter 7A. Operating System Basics. 2. Functions of Operating. Systems. • Provide a user interface. • Run programs. • Manage hardware devices. An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers,