HCMOS High-speed complementary metal-oxide
HEAD A device that reads, writes, or erases data
on a storage medium.
HERTZ (Hz) A unit of frequency equal to one
cycle per second.
HSP High-speed printer.
I2L Integrated injection logic (also IIL).
IC (1) Integrated circuit; (2) Intercomputer chan-
IC CHIPS Integrated circuit chips
ID Input data.
IDAInput data acknowledge.
IDC (1) Integrated disk controller; (2) Insulation
IDE Integrated drive electronics. A fixed disk con-
troller in which the controller is on the fixed
disk drive electronics card.
IDR Input data request.
IEEE Institute for Electrical and Electronics En-
IFF Identification friend or foe.
IIL Integrated injection logic (also I2L).
IMPACT PRINTER A printer in which printing is
the result of mechanical impacts.
IN PHASE The condition that exists when two or
more signals of the same frequency pass through
their minimum and maximum values of like
polarity at the same instant.
INDICATORS Lights that show status of an
operation or a selected item.
INSTRUCTION In a microprocessor or digital
computer system, the information that tells the
computer what to do. One step in a computer
INTELLIGENCE In communications, any signal
that conveys information.
INTERFACE The interconnecting devices, in-
cluding wiring, data converters, switchboards,
and so forth, that enable equipments to establish
communication with other equipments or sys-
INTERRUPT A method of stopping a process and
identifying a certain condition exists.
IOA Input/output adapter.
IOC Input/output controller.
IOCC Input/output communications console.
JFET Junction field-effect transistor.
JOTS Joint Operation Tactical System.
KCMX (Keyset Central Multiplexer) A data con-
version and interface device.
LAN Local-area network.
LANDS Smooth areas of CD-ROM tracks that
reflect the laser beam to a photodiode.
LASER DIODE A small laser beam generator
employing a semiconductor junction as the
LCC Leadless chip carrier.
LED Light-emitting diode.