HCMOS— High-speed complementary metal-oxide
semiconductor.
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.
Hz— Hertz.
I— Instruction.
I/O– Input/output.
I2L— Integrated injection logic (also IIL).
IC— (1) Integrated circuit; (2) Intercomputer chan-
nel.
IC CHIPS— Integrated circuit chips
ID— Input data.
IDA— Input data acknowledge.
IDC— (1)Integrated disk controller; (2) Insulation
displacement connection.
IDE— Integrated drive electronics. A fixed disk con-
troller in which the controller is on the fried
disk drive electronics card.
IDR— Input data request.
IEEE— Institute for Electrical and Electronics En-
gineers.
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
program.
INT— Interrupt.
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-
tems.
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.
JMP— Jump.
JOTS— Joint Operation Tactical System.
K— Kilobyte.
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
active medium.
LCC— Leadless chip carrier.
LED— Light-emitting diode.
AI-5
