List of Figures

Abstract

Figure 2.1 A very simple computer program, 7 written in the language Pascal Figure 2.2 A Pascal procedure which will 8 convert any temperature in Fahrenheit into Celsius Figure 2.3 An equivalent program to that in 9 Figure 2.1, but this one uses the FtoC procedure from Figure 2.2 Figure 2.4 The same program as in Figure 2.1, 12 but with different names and formatting Figure 2.5 Sample instruction from a recipe book, 23 written at a high level Figure 2.6 Fragment of an instruction from a 24 recipe book written at a low level but presenting the equivalent instruction to that in Figure 2.5 Figure 2.7 A fragment of a program written 24 in assembly code Figure 2.8 The waterfall model of software 33 development Figure 3.1 The architecture found on most 38 computers, often referred to as the von Neumann architecture Figure 4.1 A graphic, composed of polygons 62 Figure 4.2 Characterisation of the sounds that 63 can be used in human-computer interactions Figure 4.3 The conventional relationship 65 between hardware and software Figure 4.4 Middleware forms an interface between 68 different computers on a network