[Entry] General: Content Management System

[Dusch4593]

Reason/inspiration (optional)

Create a new entry in the General topic about content management systems (CMS), including:

• What they are and how they came to be.
• How and why are used.
• Common/modern examples of CMSs.

Please refer to the Docs entry template content standards and markdown style guide when creating the entry.

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New Concept Entry for Existing Topic

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