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Revise IGCSE has everything you need to achieve the grade you want. It is written by IGCSE specialists to boost your learning and focus your revision. Key points highlight the essential information Progress check questions test your learning Model IGCSE answers show what examiners look for Exam questions provide crucial exam practice. Table of Contents Components of a computer system Input, output and storage devices Computer networks Data types The effects of using IT The ways in which IT is used System analysis and design Exam practice answers Model Test papers Model Test answers Index