Dell External OEMR 2850, User Manual

Page: 159 / 176

Glossary
159
IRQ
Abbreviation for interrupt request. A signal 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
serial port in your system (COM1) is assigned to IRQ4 by default. Two devices
can share the same IRQ assignment, but you cannot operate both devices
simultaneously.
KB
Abbreviation for kilobyte(s), 1024 bytes.
key combination
A command requiring you to press multiple keys at the same time. For example,
you can reboot your system by pressing the <Ctrl><Alt><Del> key combination.
LAN
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.
local bus
On a system 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 system's
microprocessor.
LPT
n
The device names for the first through third parallel printer ports on your system
are LPT1, LPT2, and LPT3.
LRA
Abbreviation for local response agent.
MB
Abbreviation for megabyte(s). The term megabyte means 1,048,576 bytes;
however, when referring to hard drive storage, the term is often rounded to mean
1,000,000 bytes.