Once data has been captured, stored and processed on the computer it potentially becomes useful information. In this block we look at some of the ways in which we as human beings interact with and make use of this information. Unit 11 starts with a general introduction to the way in which the computer can allow us to process data in such a way that we can make more sense of the world around us.

Units 12 and 13 consider how the computer provides us with a whole range of non-textual ways of handling data and presenting information. The units look at the graphical facilities which modern computing can provide, and consider ways in which these can be used to enhance our understanding of the meaning of the data we are processing. The principles of human–computer interaction that have been developed in order to make this interaction most effective are considered. A number of other non-traditional ways in which computers can enhance access to information using auditory and tactile modes of presentation are also looked at.
Units 14 and 15 look at information transmission, and consider the ways in which security and privacy can be ensured.

Finally, Unit 16 attempts to pull all the themes of the course together, looking at what has been achieved by human beings’ development and use of computers. We look at what they do well, what they cannot do, and at what, perhaps, they should not be expected to do. We discuss the extent to which we, as individuals and society, have become dependent on the correct and continuing functioning of computerized systems. We look at the risks which this dependence brings when we consider the range of ways in which failures can occur. The unit concludes with a positive assessment of the way in which progress will continue if we can learn how to make effective use of the amazing potential that the computer brings.