Introducing ICT systems
Introducing ICT systems

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Introducing ICT systems

17 Taking an overview of ICT systems

17.1 Introduction

I'm going to pause here to try to put together some of the ideas we have encountered so far. I deliberately chose the example of a supermarket to illustrate some of the key processes involved in an ICT system. Figure 15 is a modified version of the block diagram for computers in a network (Figure 11). I have changed the labels in order to represent the networked computers in a supermarket. I have also added the second user, as in Figure 13. I'll now take each block of the diagram in Figure 15 in turn and examine what is involved. This is a 'walkthrough' of the networked computer system and it will help us to highlight the important processes that take place in each block.

Figure 15
Figure 15 Block diagram of a networked computer in a supermarket
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