+**Input** is the data, signal, or energy provided to a system. It serves as the initial information or stimulus, allowing processes to begin or actions to be performed, often received via a [Sensor](/wiki/Sensor) or through a [User Interface](/wiki/User_Interface).
+## See also
+- [Output](/wiki/Output)
+- [Data](/wiki/Data)
+- [System](/wiki/System)
... 1 more lines