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How to Pass ECDL for Microsoft by Sharon Murphy, Paul Holden

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Chapter 1. Basic Concepts of Information Technology

After tools and machines, computers were the third in a line of useful devices that humans invented to help them to do the otherwise difficult or impossible. Modern computers can perform a very wide range of tasks, one after the other, or even all at the same time. And while tools and machines work directly with physical objects, computers work with something more fuzzy: information.

In this module you will learn about the main hardware elements in a modern computer: the central processing unit (CPU), the memory (RAM) and the disk drive. You will also meet a number of other devices – such as modems, scanners and digital cameras – that are increasingly considered normal parts of a computer system, ...

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