This textbook covers the material required for all GCSE Electronics courses and is also suitable for BTEC Level 1 Electronics. Special attention is paid to electronics systems, applications and social implications. Explanations are aided by questions designed to reinforce and develop the understanding of ideas. There are checklists that summarize learning objectives after each group of related chapters. Answers to questions are provided so that students can monitor their progress. Teachers are also provided with a list of useful references for practical work and other aspects of the subject. GCSE Electronics is a complementary text to be used with Practical Electronics for GCSE.