+A [diode](/wiki/diode) is a fundamental [semiconductor](/wiki/semiconductor) device, acting as a one-way valve for [current](/wiki/current). It permits flow in a single direction, making it essential for processes like [rectification](/wiki/rectification).
+## See also
+- [Transistor](/wiki/transistor)
+- [Resistor](/wiki/resistor)
+- [Capacitor](/wiki/capacitor)
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