This book has been written to support students and teachers of the IB Diploma Course, Information Technology in a Global Society. The text covers the complete syllabus for both SL & HL and is organized to follow the structure of that syllabus. Oliver Kim explains some of the many mysteries of the modern technological world in plain language. He uses numerous diagrams and illustrations to illuminate the workings of pin numbers, networks, integrated circuits and many other familiar terms. Exercises are integrated into the text to help students prepare for the assessed components of their course.