Electrically, a bus is a
set of
wires, which when taken in
parallel, are used to
transmit data. Typically,
multiple devices are
connected to a bus, in
contrast to many other forms of
interconnect, which merely
connect one
output to another
input. See
point to point. Because of this, there is often
special logic to control who is allowed to
write to the bus. See
transfer gates,
three state logic.
Some common busses associated with
computers are
SCSI,
IDE,
PCI,
ISA.