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Output Devices
Video Display Unit (VDU) or Monitor
Video Display Unit is similar to a television. It is used to display the results of processes. The screen is illuminated by a number of dots known as pixels. The number of dots per unit area is called resolution. The higher the resolution, the better will be the quality of the picture. A lighted symbol in a form of a line or rectangle visible on the screen known as Cursor, to indicate the position for typing a command. If any keys are pressed, it moves along the alphabet typed. A typical Video Display Unit screen can accommodate 25 lines, each line consisting of 80 characters.
Printers
There are various kinds of printers. They are basically divided into two categories:
Impact printers and Non-impact printers.
Applications Software: General aspects on applications software. Applications software is the program that allow the user to get the required work done. In other words, applic
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If you have to consider the installation of communications packages, the same questions have to be asked. (a) Does the software and the modem support the necessary transmission
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Problem 1. Obtain the truth table and a Boolean expression for the following conditions: x is 0 if any two of the three variables are 1. x is 1 for all other conditions.
Optical Mark Recognition (OMR): OMR is the scanning of paper to detect the presence or absence of a mark in a predetermined position. Now days, it is used as an input device f
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