A custom administration module gives people the ability to interact with web site content, databases or other software programs. This can be a simple online photo gallery, a product listing, a calendar for scheduling, or all the above and much more. Here are the basic elements for administration...

FUNCTION - CONTENT MANAGEMENT
Administrator functions can be used to drive the dynamic content of a web site, such as calendars, event listings, product offerings, etc. or otherwise provide a CMS - Content Management System.

A blog is a great example of an administrator function. After login, the admin person can edit a blog entry or create a new one. Photo albums serve as another example of content management, allowing web site owners to upload and title files (photos).

FUNCTION - DATABASE
Administrator functions may include input to and output from a database. This can be used to drive a process, track production or process orders.

FUNCTION - INTEGRATION
Administration functions allow interaction with backend office systems. They can also drive communications: customized, automated, individual or group.

For more on Administration, see Web System Design