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Glossary-2 User’s Manual
L450/L450D
IrDA: Infrared Data Association
IRQ: interrupt request
KB: kilobyte
LAN: local area network
LCD: liquid crystal display
LED: light emitting diode
MB: megabyte
MMC: multi media card
OCR: optical character recognition (reader)
PCB: printed circuit board
PCI: peripheral component interconnect
RAM: random access memory
RGB: red, green, and blue
ROM: read only memory
RTC: real time clock
S/P DIF: Sony/Philips Digital Interface Format
SDRAM: synchronous dynamic random access memory
SLI: Scalable Link Interface
SO-DIMM: small-outline dual in line memory module
TFT: thin-film transistor
UART: universal asynchronous receiver/transmitter
USB: Universal Serial Bus
VESA: Video Electronic Standards Association
VGA: video graphics array
XGA: extended graphics array
A
adaptor: A device that provides a compatible connection between two
units. For example, the computer’s internal display adapter receives
information from the software and translates it into images on the
screen. An adapter can take a number of forms, from a
microprocessor to a simple connector: An intelligent adapter
(one that is capable of doing some processing) may also be called a
controller.
alphanumeric: Keyboard characters including letters, numbers and other
symbols, such as punctuation marks or mathematical symbols.
alternating current (AC): Electric current that reverses its direction of flow
at regular intervals.
analog signal: A signal whose characteristics such as amplitude and
frequency vary in proportion to (are an analog of) the value to be
transmitted. Voice communications are analog signals.