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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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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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Second Generation of Computer

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The period of the second generation was from 1955-1965. The transistors were invented in 1947, which was used in second generation computers. By using transistors computer was becoming less expensive, more relieve, less power consume than generation computer. In this generation was used as assembly language and high-level programming languages such as COBOL and Fortran and used batch processing. Characteristics of the second generation computer Use of the transistors Faster than the first generation computer High speed input/output devices Reduced size Magnetic memory and magnetic storage disk Use of high-level programming languages such as Fortran and COBOL Solution to heat generation Improvement of speed and reliability Communication by using telephone line Some computers of second generation IBM 1400 IBM 1620 IBM 7094 series UNIVAC 1108 ...
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