An 
electrical bus is a physical electrical interface where many devices share the same electric connection.  This allows signals to be transferred between devices (allowing 
information or 
power to be shared).  A bus often takes the form of an array of wires that terminate at a connector which allows a device to be plugged onto the bus.
-  Buses are used for connecting components of a computer: a common example is the PCI bus in PCs. See computer bus.
-  Buses are ysed for communicating between computers (often microprocessors). See computer bus.
-  Buses are used for distribution of electrical power to components of a system. The (usually) thick connectors used are called bus-bars[?].
See also distributed generation, Switched-mode power supply; SMPS.
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