Student textbook covering AQA GCSE Computer Science 8520 specification in depth. It includes programming examples in the programming languages Python, VB.NET, Pascal/Delphi, C# and Java. The textbook is organised into chapters that map one-to-one to the specification. Each chapter contains questions which test students' understanding of the topic.  Some chapters also include programming tasks, other tasks and discussion questions. The textbook is accompanied by downloadable resources and the solutions to all the questions.