+An **Event Handler** is a routine designed to process specific actions or occurrences within a program. It waits for an [Event](/wiki/event) to happen, then executes predefined instructions, often as a [Callback](/wiki/callback), to respond and enable dynamic interaction.
+## See also
+- [Event](/wiki/event)
+- [Callback](/wiki/callback)
+- [User Interface](/wiki/user_interface)
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