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Input & Output Devices

Input & Output Devices Of a Computer INPUT DEVICES   Data and instructions are entered into a computer through input devices.  An input device converts input data and instructions into a suitable binary form, which is stored in main memory of a computer. 1. Keyboard  Computer keyboard is an electromechanical component. It Creates special standardized electronic codes when a key is pressed. The codes are transmitted along the cable that connects the keyboard to the computer system unit or terminal, where the incoming code is analyzed and converted into the appropriate computer usable code. Keyboards come in a variety of sizes and shapes having a number of features in common. 2. Mouse The mouse is an input device that is much in use nowadays in graphics as well as when working with the GUI (Graphical User Interface). It slides on a rubber ball in mechanical mouse and laser rays in optical mouse, and has two or more button on the top. when a mouse is s...
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Versions of Windows

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WINDOWS VERSIONS Windows 1.0 In 1985 the first version of windows was a milestone product because it allowed PC users to switch from the MS-DOS method of typing commands at the C prompt. Use a mouse to point and click their way through functions, such as starting applications, in the operating system. Windows 1.0 Screen  Windows 2.0 In 1987 with the second version of Windows, Microsoft took advantage of - The improved Processing speed of the Intel 286 Processor. Expanded Memory. Inter-application communication capabilities using Dynamic Data Exchange (DDE). Windows 2.0 featured support for VGA graphics standard, Allowed users to: - Overlap Windows. -Control Screen layout. -Use Keyboard. -Combinations to move rapidly through Windows Operations. Windows 2.0 Screen Layout Windows 3.0                  In 1990, Microsoft's first mainstream computing platform offered 32 bit...
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Operating System

OPERATING SYSTEM An Operating system is a program that acts as an interface between the user of a computer and computer hardware. The purpose of an operating system is to provide an environment in which user can execute programs in a convenient and efficient manner. It is the first program loaded into the computer's memory after the computer is switched on. Popular operating systems include MS-DOS, OS/2. Windows and UNIX. The operating system is an important component of the computer system, because it sets the standards for the application programs that run on it. All programs must be written in a manner, which is recognized by the operating system. An Operating System is like a soul of a computer, Without an Operating System  a computer considered as dead, It has no use. Functions of Operating System 1. Memory Management Function An Operating System manages the primary memory of the system. It allocates the memory, on the request of a process, which is being run at ...
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