... users can understand the project and be able to implement the design from this document alone. Both the ISEB class and the SEI staff will be able to read this document with clarity, as it will use natural language and diagrams. However, this document is written with the SEI staff in mind. The extension to the existing system will provide it with a Web component, allowing individual users to access photographs over the Internet. The users will also be able to buy and sell images to other users of the system. The benefit of this is that it will provide a much more interactive experience for the user. This design document will add a few additional functional and non-functional requirements to the existing requirements from the S3G design document to deal with the new payment system. It will also remove several unnecessary features from the original implementation, such as the games modules, ...

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