Overview
Additional systems are required to allow the content to be managed.
These systems include indexing, a search engine, billing, access control and copy
control. The content needs to be indexed, and search systems implemented to help
the end-user find the material they want. The service may need to be paid for,
so money may need to be received from the end-user. Access may be controlled,
so that the material is not freely available to anyone accessing the same network,
and some thought needs to be given to preventing the unlawful copying and use of
the material made available through the service.