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The computer uses the exit peripherals to give information to us or to an actuator: screen,speakers,printer,lith bulb,motor...

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Entry peripherals give information to the computer:keyboard,mouse,microphone,thermostat.....

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Peripherals are elements of communication between the computer and outside world (incluiding ourselver).

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The graphics card looks similar to the RAM .It is also a green plastic card with chips.

It defines the fomat of the graphics and heps the processor to process the graphics faster

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They store the information in chips:

Advantages:Rewritable
Quick

Disadvantege:More expensive than a CD or a DVD

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We call them "optical memories" because they use light to work

Advantages: cheap
Disavantages:Not good to rewrite

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They are easy  to connect a and  disconnect from the computer.Also,they are easy to carry.

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(Ramdom Access Memory):This is  a green platic card with chips.

The RAM is installed i a slots on the mother board.

Mother boards have emply slots so tht we can add more RAM  if the want.

The RAM stores the applications and files that we are using.

ADVANTAGES:It stores (writes) and retrieves (reads) quicky.

Disanvantages:We lose the work if there is an electrical power cut.Small memory capacity (around 6GB) compared to the hard disk.

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Also called "hard drive", it is a set of rigid discs with a magnetic surface.

ADVANTAGES:
It can store a large amount of date (today around 1TB) We can save and erase the information when we want.

DISADVANTAGES:
It is relatively slow:comparared to other types of memory,it takes longer to read and write information.

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Memory stores information.There are various types od memory in the computer

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The CPU (Central Procesing Unit) is a big,green,platic board with a lof of chips and mango other electronic components mounted an it.The central procesing unit is a also called.

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Hardware is the part of the  computer that we can touch

The hardware is the components that are intercomponented.The computer needs all those componts,but they are

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Computers are not inteligent;they are tools that  follow instruction perfectly and quicky