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8 Dell Precision 210 Desktop Systems User’s Guide
Abbreviation for interrupt request. A sig-
nal that data is about to be sent to or
received by a peripheral device travels by
an IRQ line to the microprocessor. Each
peripheral connection must be assigned
an IRQ number. For example, the first se-
rial port in your computer (COM1) is
assigned to IRQ4 by default. Two devices
can share the same IRQ assignment, but
you cannot operate both devices
simultaneously.
Acronym for Industry-Standard Architec-
ture. A 16-bit expansion bus design. The
expansion-card connectors in an ISA com-
puter are also compatible with 8-bit ISA
expansion cards.
Abbreviation for information technology
equipment.
Jumpers are small blocks on a circuit
board with two or more pins emerging
from them. Plastic plugs containing a wire
fit down over the pins. The wire connects
the pins and creates a circuit. Jumpers
provide a simple and reversible method of
changing the circuitry in a printed circuit
board.
Abbreviation for kilo-, indicating 1,000.
Abbreviation for kilobyte(s), 1,024 bytes.
Abbreviation for kilobyte(s) per second.
Abbreviation for kilobit(s), 1,024 bits.
Abbreviation for kilobit(s) per second.
A command requiring you to press multi-
ple keys at the same time. For example,
you can reboot your computer by pressing
the <Ctrl><Alt><Del> key combination.
Abbreviation for kilogram(s), 1,000 grams.
Abbreviation for kilohertz, 1,000 hertz.
Acronym for local area network. A LAN
system is usually confined to the same
building or a few nearby buildings, with all
equipment linked by wiring dedicated
specifically to the LAN.
Abbreviation for pound(s).
Abbreviation for light-emitting diode. An
electronic device that lights up when a
current is passed through it.
On a computer with local-bus expansion
capability, certain peripheral devices
(such as the video adapter circuitry) can
be designed to run much faster than they
would with a traditional expansion bus.
Some local-bus designs allow peripherals
to run at the same speed and with the
same width data path as the computer’s
microprocessor.
The device names for the first through
third parallel printer ports on your comput-
er are LPT1, LPT2, and LPT3.
Abbreviation for meter(s).
Abbreviation for milliampere(s).
Abbreviation for milliampere-hour(s).
See coprocessor.
Abbreviation for megabit.