Computer hardware

By John Gallop

Hard Drive/SSD

When you save somthing on your computer it goes onto somthing called a hard drive. This is a little box woth a disc inside and an arm that writes the document onto it. This is a rather old fashioned way of saving things and it makes the device rather heavy and the arm can get disorientated and save only parts of your documents.

More moden and up market devices such as the ipad use an ssd (solid state drive) card. This is a smaller, more exnsive, version of hard drive and has no moving parts hense the name. Another benefit to this is that it is alot thinner than a hard drive meaning it can fit in thinner devices such as the ipad, mac book air or iphone.

Optical drive

when you watch a dvd or blu ray or cd the disc is inserted into an optical drive which is a disc player that has a blue lazer that reads off the disc and plays the hd movie. If it is not blu ray then you will have a dvd drive which plays dvds snd cds then you can even have a cd drive which only plays cds

CPUs (Central Processing Units)

A CPU (more commonly known as a processor) is basically the brain of a computer; it makes all the calculations and loads that make it work. It works out what to display and when to change the page. So essentially the more powerful the processor, the faster your computer is.

Devices such as mobile phones and have dual core processors. these are processors that can do two or more things at once. More expensive products such as iPods or tablets have quad core processors wich can evidently can do four things at once.

RAM (RandomAccessMemory)

RAM is where you store copied pictures from the internet and while you switch to where you want to put the picture the RAM will hold your picture. Also at the bottom of your screen you will see the highlighted icons along it these are saved on the ram so you can re-open it when you want to instead of having to restart the whole program again. Also when you open a word document it goes to the RAM and everything you write goes to the RAM until you permenantly save it. The more RAM you have, (for example a macbook pro can have up to 16 gigabytes of RAM) the faster your computer is.