+A tube is a hollow cylinder, often used to convey fluid, gas, or data. Its form allows for efficient transport or structural support. From the vast underground networks of a [Subway](/wiki/Subway) system to the delicate components of a [Vacuum Tube](/wiki/Vacuum_Tube), tubes are fundamental in engineering and everyday life.
+## See also
+- [Pipe](/wiki/Pipe)
+- [Cylinder](/wiki/Cylinder)
+- [Conduit](/wiki/Conduit)