Content Management System

A content management system (CMS) is a system providing a collection of procedures used to manage work flow in a collaborative environment. These procedures can be manual or computer-based.

The procedures are designed to do the following:

• Allow for a large number of people to contribute to and share stored data.
• Control access to data, based on user roles (defining which information users or user groups can view, edit, publish, etc.)
• Aid in easy storage and retrieval of data.
• Control of data validity and compliance.
• Reduce repetitive duplicate input.
• Improve the ease of report writing.
• Improve communication between users. 

In a CMS, data can be defined as nearly anything: documents, movies, text, pictures, phone numbers, scientific data, and so forth.

CMSs are frequently used for storing, controlling, revising, semantically enriching, and publishing documentation. Serving as a central repository, the CMS increases the version level of new updates to an already existing file. Version control is one of the primary advantages of a CMS

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taken from Wikipedia