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

stores programmes and data for processing.

central processing unit. it is like the brain of the computer.

these devices read incoming data and pass it on to the CPU. Examples are : keyboard ,disk drive ,scanner ,bar code reader , voice recognition , and digital camera.

these accept information from the CPU and display the results for the user. Examples are: printer, monitor.

these keep information and instructions in the computer so that they can be used again. Examples are : CD’s, floppy disks, hard drive.

Used to select text, insert text or an icon on page by clicking and dragging. The cursor changes shape depending on the task. E.g arrow, beam, egg timer shapes.

Used to type words on the page. The most common type is a QWERTY keyboard; it is laid out in an ‘unfriendly’ manner, in order to slow down speed typists. The most commonly used letters are spaced out to avoid them sticking.

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 UPU or Universal product code.

they are used to collect information on a product by scanning the bar code.

used for drawing illustations or creating graphics/pictures on a page.

VDE/Voice Data Entry :

it can accept human speech and convert it to the spoken word onto your screen.

Camera/Tape Recorder :

used to input voice or visual pictures on to your computer.

Optical Character Reader. they are devices that scan the document and turn it into readable form on your screen.

Magnetic Ink Character Reader.they are used when documents, contain magnetic digits that contain information.

Optical Mark Recognition/Reader.The computer will pick up marks, e.g. pencil marks on a sheet to collect information.

it is a special screen which alolows you to carry out a task by touching on the screen.

Light Pen or Stylus :

you can use a special pen to touch the

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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. it is like the brain of the computer.
Input devices:	these devices read incoming data and pass it on to the CPU. Examples are : keyboard ,disk drive ,scanner ,bar code reader , voice recognition , and digital camera.
Output devices:	these accept information from the CPU and display the results for the user. Examples are: printer, monitor.
Storages 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 page by clicking and dragging. 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 ‘unfriendly’ manner, in order to slow down speed typists. The most commonly used letters are spaced out to avoid them sticking.
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 UPU or Universal product code.
point for sale :	they are used to collect information on a product by scanning the bar code.
digitiser :	used for drawing illustations or creating graphics/pictures on a page.
VDE/Voice Data Entry :	it can accept human speech and convert it to the spoken word onto your screen.
Camera/Tape Recorder :	used to input voice or visual pictures on to your computer.
OCR :	Optical Character Reader. they are devices that scan the document and turn it into readable form on your screen.
MICR :	Magnetic Ink Character Reader.they are used when documents, contain magnetic digits that contain information.
OMR :	Optical Mark Recognition/Reader.The computer will pick up marks, e.g. pencil marks on a sheet to collect information.
Touch screen :	it is a special screen which alolows you to carry out a task by touching on the screen.
Light Pen or Stylus :	you can use a special pen to touch the

Created by: joannemurtagh10

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