This Log On Computer Studies Students' Book 3 explores the world of computers. The course book is intended to help Form Two students acquire skills in Word processing, Spreadsheets, Database, Desktop Publishing (DTP), Internet and Emails, and Data Security and controls. The course book is also intended to help students develop greater depth knowledge of computer studies and aspire to work in the Information and Communication Technology (ICT) industry. The course book has special features to help students develop the essential skills required in studying, practising and interacting with computers. Each chapter opens with the chapter objectives, which spell out what the students are expected to have learnt, and the skills they are expected to have developed after studying the chapter. Other features include keywords, practical learning activities and a comprehensive glossary. The course book also has revision exercises and sample test papers. The answers to the exercises are provided in the Teachers' Guide. An important feature that addresses emerging issues is labelled "Information is Power." The write-ups under this title are meant to encourage the student to source for information on social challenges. They aim at imparting survival skills to the students. The write-ups discuss some of the social challenges that the youth face, for example, drugs and substance abuse, HIV/Aids and other Sexually Transmitted Infections (STIs), teenage pregnancy, and abortion among others. It is expected that after studying these write-ups, students should be able to make informed decisions.