| Short for
Industry Standard Architecture, ISA was introduced by IBM and was originally an 8-bit
computer bus that was later expanded to a 16-bit bus in
1984. When this bus was originally released it was a
proprietary bus, which
allowed only IBM to create peripherals and the actual interface.
However, in the
early 1980's other manufacturers were creating the bus. In 1993, Intel and
Microsoft introduced a PnP ISA
bus that allowed the computer to
automatically detect and setup computer ISA peripherals, such as a modem
or sound card. Using the PnP technology, an end-user would have the
capability of connecting a device and not having to configure the device using
jumpers or dipswitches.
Many computers today no longer included the ISA slots and instead are using more PCI and AGP slots.
Below is a graphic of what an ISA expansion card may look like as
well as the slot it connects into on the motherboard.
Also see: 16-bit, Bus,
EISA,
MCA, Motherboard definitions
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