Computer Systems

By Alesha Majid

What is a computer?

A computer can input and receive data, process data , store data digitally and finally output data. It has storage , input , a processor and output. First it inputs the information like taking a picture from a camera, then it processes it like getting ready to show it and then finally it outputs it like showing/presenting the picture to you. These are the most important three stages:

The Base Unit

The base unit contains many different parts that the computer needs to work/operate. The most important ones are:


Storage media are used to keep data when a computer is switched off. Data is read from or written to a storage medium by a drive. These are the most popular ones:


RAM means Random Access Memory. RAM is a form of computer data storage. A Random Access Memory device allows data items to be accessed by nearly anyone or anything.
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