+An **electrical signal** is a time-varying [Voltage](/wiki/voltage) or [Current](/wiki/current) that carries information. It serves as the fundamental language of electronic systems, enabling communication and control across vast networks of [Circuits](/wiki/circuit).
+## See also
+- [Electronics](/wiki/electronics)
+- [Analog Signal](/wiki/analog_signal)
+- [Digital Signal](/wiki/digital_signal)
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