Define Data
Raw facts or figures. Has no meaning and can be set of random words or numbers. Can be readings from sensors or survey facts etc.
Define Information
Data that has been processed to give it meaning. Data is no longer a useless set of words or numbers. It now means something.
Define Knowledge
Information where a rule/set of rules had been applied to it. A conclusion has been drawn from the information.
What does GIGO stand for?
Garbage in, Garbage Out