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general theory notes

Hardware: Is any physical part of a computer (it is a group of machines)
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 Data for processing.
CPU: Central Processing Unit.
Input Devices: These Devices read incoming Data and pass it on to the CPU.
Output Devices: these Accept information from the CPU and display the result for the user. Examples are: Printer, Monitor.
Storage Devices: these keep information and instructions in the computer so that they can be used again. Examples are: CD's, Floppy Disks, Hard Drive.
Mouse: Used to select text, insert text or an icon on a page by clicking and daragging. the cursor changes shape depending on the task. E.g. arrow, beam, egg timer shapes.
Keyboard: Used to type words on the page. the most common type is a QWERTY Keyboard; it is laid out in an 'unfreindly' manner, in order to slow down speed typists. The most commonly used letters are spaced out to avoid them sticking
Bar Code R
Created by: jordanfenlon10