| Keyword | Definition |
|---|---|
| CPU | central processing unit that fetches, decodes and executes instructions |
| GPU | graphics processing unit that controls what is displayed on a screen |
| hard disk drive | type of storage device which stores data and instructions even when the power is switched off. |
| input | type of device which sends data into a computer from the outside world (e.g. mouse) |
| output | type of device which receives information from a computer and shares it with the outside world (e.g. printer) |
| process | a calculation which can turn input data into useful information |
| RAM | very fast type of storage device which only stores data and instructions while the power is switched on (everything is lost when the power is off) |
| solid state drive | fast type of storage device which stores data and instructions even when the power is switched off. |
| storage | type of device which saves data so that it can be processed or displayed later |
