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ICT
general theory notes
| Term | Definition |
|---|---|
| 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 |