Computer Hardware

2nd Year IT

Hard Drive/SSD

A hard drive is a disk which stores all the files and information on a computer. All the files are copied onto the hard drive, and when you save it, a link is created from the computer to the hard drive, and that is what allows you to come back to your files later. When you delete the file, the link is destroyed, but the information is always there. To read the information, there is an ‘arm’ to read it with, a bit like a record.

An SSD (solid state drive) does exactly the same thing as a hard drive, but faster. An SSD is smaller and lighter, without a disk or an arm – it is like a small rectangle. The only disadvantage is that it is a lot more expensive than a hard drive.

Optical Drive

An optical drive is a disk reader. With a laser, it reads things like CDs, DVDs and Blu-Rays. It can also write information onto disks.

CPU

A CPU is a Central Processing Unit. It is the brain/heart of the computer. It does all the calculations and works everything out for the computer; it is also the heart as it it the centre of the computer.

*the CPU is a lot smaller than the picture*

Monitor

A monitor is the shell of the computer (the screen area). It can also refer to the whole computer box. There are 3 main ways to categorise monitors:
  • monochrome : Monochrome monitors actually display two colors, one for the background and one for the foreground. The colors can be black and white, green and black, or amber and black.
  • gray-scale : A gray-scale monitor is a special type of monochrome monitor capable of displaying different shades of gray.
  • color: Color monitors can display anywhere from 16 to over 1 million different colors. Color monitors are sometimes called RGB monitors because they accept three separate signals -- red, green, and blue.
  • Above is a link for a very useful website with lots of info about computer hardware.

    About this flyer

    This flyer is a school project. However, I now love writing it as I find it very interesting; I hope you find it interesting too.