Computers are all around us: in cars, kitchen scales, digital cameras, etc. But how do they store the data they hold? This unit will help you to understand how the data in a computer represents something in the outside world. You will also explore how ASCII code and Unicode are used to control data. This study unit is just one of many that can be found on LearningSpace, part of OpenLearn, a collection of open educational resources from The Open University. Published in ePub 2.0.1 format, some feature such as audio, video and linked PDF are not supported by all ePub readers.