This is a book about A-Level Computing. It aims to fit with the AQA GCE A-Level Computing syllabus but is not endorsed by AQA. It should be useful as a revision guide or to find alternative explanations to the ones in your textbook. If you haven't heard of an A-Level then this book probably won't be of much interest to you but you can find out about them at Wikipedia.

If any part of this book is unclear or even wrong then please post a comment on the discussion page or simply fix it yourself! In particular, please say if the book assumes any knowledge or skills which not all A-Level Computing students have.

AS modules

A2 modules


Accepted languages (please note that support for PHP, C and C# at AS Level was withdrawn in 2011. C# has been reintroduced in 2015)

A2 Projects can be written in any language.

How to read the book

You will meet several coloured boxes, here are their meanings:

Specification link

What the specification says you must learn for each chapter


Example questions and how to solve them


Questions to test yourself, click below


to check if you were right


Topics that aren't examined but you might be interested in

There will be a lot of concepts that you need to be familiar with, definitions are highlighted like so:

Word - meaning

Course Structure

  • To be awarded an AS (Advanced Subsidiary) Level qualification in Computing, a student must take the 2 AS modules.
  • To be awarded an A (Advanced) Level qualification in Computing, a student must take all 4 modules.

The book is split into the four units. Each unit is split into chapters with each chapter covering the topics for that module.

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