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Keyboard

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Keyboard     Keyboard is an input device consisting a set of type writer like keys that enable you to enter data into your computer. It is a typewriter-style device. These are the most common and very popular input device. It help us input data to the computer/desktop. The layout of the keyboards is like that of traditional typewriter. There are 5 pare of a keyboard. Typing Keys Function Keys Control Keys Number Keys Special Purpose Keys Typing Keys The typing keys include the letter keys ( A-Z ) and digit keys ( 0-9 ) which generally give the same layout as typewriters. Function Keys The twelve function keys are present on the keyboard which are arranged in a line at the top ( F1, F2, F3, F4, .. F11, F12 ). ...
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Monitor

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Computer display is also called a display screen or VDT ( Video Display Terminal). A monitor screen used to display the output. Images are re-presented on monitor by Dodd called pixel. Monochrome Monitor CGA (Colour Graphics Array) EGA (Enhanced Graphics Array) VGA (Video Graphics Array) SVGA (Super Video Graphics Array) Monochrome Monitor Computer display is as the name these type of monitors have single for ground colour but it offers various attributes. It was introduced by IBM (International Business Machine) in 1962. CGA (Color Graphics Array) It introduce by IBM (International Business Machine) in 1982. It has a low resolution screen it supports four colour. EGA (Enhanced Graphics Array) EGA is a video display standard that has a resolution of 640×350 pixel and it support...
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First Generation of computer

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The period of the first generation was from 1946-1955. In this generation used vacuum tubes as the basic components for memory and circuitry for central processing unit (CPU). ENIAC (Electrical Numerical Integrator And Computer) was first electronic computer developed in 1946 by Mauchley and Eckert in USA. This computer used high speed vacuum tube to process data, in this generation used machine code as a programming language. This machine was 30×18 feet long and weight 30 ton and cost $4 lakh dollar. Characteristics of the first generation computer Use of magnetic drums Use of vacuum tubes to make circuits Use of machine languages and symbols in instructions Use of punch cards as input/output devices Use of high electricity Very small reliable output Complex and expensive to maintain Huge in size and poor mobility Some computers of first generation ENIAC ...
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