+An **App** (short for application) is a computer program designed to perform a specific function directly for the user. These digital tools run on various [Operating System](/wiki/Operating_System) platforms, from [Mobile Device](/wiki/Mobile_Device) to desktop, shaping how we interact with technology.
+## See also
+- [Software](/wiki/Software)
+- [Program](/wiki/Program)
+- [User Interface](/wiki/User_Interface)
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