input/output (I/O) device
A piece of equipment that transmits data to (input) and from
(output) the system. For example, a terminal or a mouse.
Integrated Services Digital Network (ISDN)
An international telecommunications standard that allows a
communications channel to simultaneously carry voice, video,
and data.
interface
An electronic circuit board that links an external device to a
computer. Also, a device or piece of software that allows a user
to communicate with the system or allows the components of the
system to communicate with each other.
internal cache
Cache memory located in the DECchip. See also primary cache
and cache memory.
internal processor register (IPR)
A register internal to the CPU chip.
I/O
See input/output device.
ISDN
See Integrated Services Digital Network.
jack
A receptacle into which you insert a plug.
kilobyte (KB)
The measure used to refer to memory or secondary storage
capacity, equal to 1,024 bytes.
LAN
See local area network.
Glossary–17
