Digital Equipment DEC 3000 Series Service Information page 412

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. See
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
See memory.
internal processor register (IPR)
A register internal to the CPU chip.
ISDN
See Integrated Services Digital Network.
jack
A receptacle into which you insert a plug, such as an audio jack.
kilobyte (KB)
The measure used to refer to memory or secondary storage
capacity, equal to 1,024 bytes.
LAN
See local area network.
light-emitting diode (LED)
A semiconductor device that glows when supplied with a specific
voltage. The operator control panel contains LEDs that indicate
the status of the modules in the computer.
local
In close proximity to the computer. Compare with remote.
local area network
A high-speed network communications system that connects a
variety of multiple computers within a limited geographical area,
such as one building or a group of buildings. It is a privately
owned communication network whose speed is upward of one
megabit per second. Using a LAN, multiple users can share
devices and files at higher speeds, faster response times, and
lower costs than with telephone lines.
Glossary–12