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Glossary
Infrared
Light just beyond the red portion of the visible light
spectrum which is invisible to humans.
Infrastructure
A name of a wireless LAN configuration. This type of
communication uses an access point.
Another type of communication is called AdHoc.
IP Address
An address used for computers to communicate in the
TCP/IP environment.
Current IPv4 (version 4) uses four values in the range
between 1 and 255. (Example: 192.168.100.123).
There are two types of IP address: global address and
private address.
The global address is an only address in the world. It is
controlled by JPNIC (Japan Network Information
Center). A private address is an only address in the
closed network.
IR
An abbreviation for infrared.
IrDA
Infrared Data Association. An organization which
produces standards for communication using infrared
as the carrier.
IRQ
Interrupt Request. An acronym for the hardware signal
to the CPU that an external event has occurred which
needs to be processed.
KB
Kilobyte.
LAN
Local Area Network. An interconnection of computers
and peripherals within a single limited geographic
location which can pass programs and data amongst
themselves.
LCD
Liquid Crystal Display. A type of display which makes
images by controlling the orientation of crystals in a
crystalline liquid.
Lithium ion Battery
A type of rechargeable battery which has a high power-
time life for its size and is not subject to the memory
effect as Nickel Cadmium batteries.
LPT Port
Line Printer Port. A way of referring to parallel interface
ports because historically line printers were the first and
latter the most common device connected to parallel
ports.
MAC Address
Media Access Control Address
A unique physical address of a network card. For
Ethernet, the first three bytes are used as the vendor
code, controlled and assigned by IEEE. The remaining
three bytes are controlled by each vendor (preventing
overlap), therefore, every Ethernet card is given a unique
physical address in the world, being assigned with a
different address from other cards. For Ethernet, frames
are sent and received based on this address.
MB
Megabyte.
Megahertz
1,000,000 cycles per second.
Memory
A repository for data and applications which is readily
accessible to your LifeBook notebook’s CPU.
MHz
Megahertz.
MIDI
Musical Instrument Digital Interface. A standard
communication protocol for exchange of information
between computers and sound producers such
as synthesizers.
Modem
A contraction for MOdulator-DEModulator. The
equipment which connects a computer or other data
terminal to a communication line.
Monaural
A system using one channel to process sound from all
sources.
MPU-401
A standard for MIDI interfaces and connectors.
MTU
Maximum Transmission Unit
The maximum data size that can be transferred at a time
through the Internet or other networks. You can set a
smaller MTU size to obtain successful communication,
if you have difficulty transferring data due to the fact
that the maximum size is too large.
NTSC
National TV Standards Commission. The standard for
TV broadcast and reception for the USA.
B Series.book Page 83 Thursday, May 17, 2007 2:25 PM