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I.C.T

GENERAL THEORY NOTES

TermDefinition
Hardware. Is any physical of a computer
Hardware is made up of. (A)The CPU and main memory. (B)Input devices. (C)Output devices. (D)Storage devices.
Main memory. Stores programmes and datafor processing.
CPU. Central Processing Unit- The brain of the computer
Input device. These devices read incoming data and pass it on to the CPU.
output devices. These accept information from the CPU and display the results for the user.
Storage devices. These keep information and instructions in the computer so that they can be used again.
MOUSE: Used to select text, insert text or icon on a page by clicking and dragging.The cursor changes shape depending on the task.
KEYBOARD: Used to typewords on the page.The most common type is a QWERTY keyboard.
BAR CODE READER/WAND READER OR SCANNER. They read or scan the zebra like bars that you see on most products.the black and white bars are different widths and together they form a code called a UPC or universal product code.
Point of sale terminal: They are used to collectn information on a product by scanning the bar code.
Digitiser: Used for drawing illustrations
Camera/Tape recorder. Used to input voice or visual pictures on to your computer.
VDE/Voice data entry. It can accept human speech and convert it into spoken word onto your screen.
OCR/optical character reader. They are devices that
Created by: conorkavanagh10
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