This revision guide covers Unit 1 Understanding Computer Systems, helping you to plan and pace your revision with topics concisely covered and clearly referenced.

- Essential facts that are carefully organised to make revising easier

- Exam tips and hints to show your students how to avoid losing marks and get the best grades

- 'Check your understanding' questions to support your students in the run-up to the exams, with answers provided free online at www.hodderplus.co.uk/myrevisionnotes/gcse-ict