This book gives you a success story in your senior secondary studies. It meets the requirements of the Namibian Syllabus for the new curriculum, 2021. It was approved as a learners’ book by the National Institute of Educational Development (NIED) in 2020. It builds you into a pure computer expert as it touches on aspects of the computer world. From the programming teachings in this book, expect to be a good programmer, who shall be developing application software facing reality in today’s world of technology. All aspects of life are getting computerised, hence a lot of chances in software development. The book teaches you more on hardware, software, communication, data representation, circuits of logic gates, algorithms and programming concepts, data security/privacy/integrity. Database manipulation is discussed also where it has to be done practically to understand the effects of some of the statements. Database plays a vital role in the field of computer programming since it has to store records used by any business organisations. Python and C++ Programming Languages are used for programming skills. It is a very good book for those who want to pursue Computer Science at tertiary level, especially those who love creating application programs. 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, 9, and 10 & 11 (each with a teacher’s guide), and Success in Computer Studies Level 1, 2 and 3.