I/O HardwareĬomputers operate many huge kinds of devices. These methods form the I/O sub-system of the kernel of OS that separates the rest of the kernel from the complications of managing I/O devices. This is because I/O devices vary so widely in their functionality and speed (for example a mouse, a hard disk and a CD-ROM), varied methods are required for controlling them. The controlling of various devices that are connected to the computer is a key concern of operating-system designers. In this chapter, you will learn about the various uses of input output devices concerning the operating system. The primary role of the operating system in computer Input / Output is to manage and organize I/O operations and all I/O devices. For example, when you browse a web page or edit any file, our immediate attention is to read or enter some information, not for computing an answer. In a lot of cases, the most important job is Input / Output, and the processing is simply incidental.

The three major jobs of a computer are Input, Output, and Processing.

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Device manager in operating system