Simple and understandable language, self-study encouragement, independence in computer use, working understanding of the Windows XP operating system, ideas of data communication and networks, working knowledge of the Internet and the World Wide Web, and an introduction to computer viruses. list of contents Introduction to Computers, Computer as a System, Input/Output Devices, Memory and Storage Devices, and 5 - Binary codes and number systems 7 - Boolean algebra and logic circuits 6 - computer arithmetic Computer software, 8; planning and designing programmes, 9 10: operating systems and programming languages Networks for data communication (12) Internet, World Wide Web, and 14 computer viruses, number 16.