This book gives you a success story in your senior secondary studies. It meets the requirements of the Namibian Syllabus for the new curriculum, 2019. It was approved as a learners’ book by National Institute by Educational Development (NIED) in 2018. It moulds you into a pure computer expert as it touches on aspects of the computer world. You experience reality of today’s technology. The book teaches you System Development Life Cycle, Computer Applications and their Economic and Social implications, data capturing methods, data representation, data storage formats, logic gates, algorithms and programming concepts, hardware, software, communication, Spreadsheet and Database. Visual Basic Programming Language is used for programming skills. The book also demonstrates how a project can be handled. When working with practical aspects, hands-on approach is the best. The book has activities for you to evaluate your understanding. Practical exercises are available for your hands-on skills. Research work is also included and it is good for you to do a lot of research to understand better. Books in the series: Understanding Computer Studies Grade 8 and 9, and Success in Computer Studies Level 1, 2 and 3.