This book is suitable to be used as a textbook in an educational institution or training centre, where introductory computer courses are offered. It assumes no previous knowledge of the subject and uses very simple language and illustrations to explain the key terms. The book has both theory and practical aspects. Chapters 1 to 5 are theoretical and chapters 6 to 9 are practical. The theory part explains how computers started, classification of computers, standard computer laboratory set up, computer hardware (input, output and storage devices), and considerations to make in purchasing a computer system (both software and hardware). The practical section explains step-by-step on how to work with an operating system, a wordprocessor, desktop publisher and a computer programming language. When working with practical aspects, hands-on approach is the best. The operating system used in this book is Windows 8.1 and Microsoft Office 2010 is used for word-processing and desktop publishing for illustration purposes. The Programming Language used is Scratch 1.4. Scratch 1.4 can be downloaded from the Internet for free. Install it and learn Scratch language easily. This book is for grade 8 learners. The grade 9 learners’ book is also available. You can also consider Success in Computer Studies series (Level 1, Level 2 and Level 3). These books can also help if you are using Windows 7 and Microsoft Office 2007.