Media source or MediaSource may refer to:

• Mass media, media used by the public as sources of information and entertainment
• Source (journalism), an entity used as source of information
• Media Source Inc. (d.b.a. MSI Information Services), American publishing company
• Media Source Extensions (MSE), a W3C specification for using delivering digital media
• Media server, a device or application that makes digital media available over a network

This disambiguation page lists articles associated with the title Media source.
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