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Fujitsu LifeBook T4220 Tablet PC Manual

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Glossary
IEEE802.11b
One of the wireless LAN standards prescribed by 802
committee in charge of establishing standards of LAN
technology in IEEE (Institute of Electrical and Elec-
tronic Engineers). It allows communications at the
maximum speed of 11 Mbps by a band of 2.4 GHz (ISM
band) which can freely be used without radio communi-
cation license.
IEEE802.11g
One of the wireless LAN standards prescribed by 802
committee in charge of establishing standards of LAN
technology in IEEE (Institute of Electrical and Elec-
tronic Engineers). It allows communications at the
maximum speed of 54 Mbps by a band of 2.4 GHz (ISM
band) which can freely be used without radio communi-
cation license.
Infrared
Light just beyond the red portion of the visible light
spectrum which is invisible to humans.
Infrastructure
A designation of Wireless LAN network configurations.
It indicates a form of communication using an Access
Point.
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 Tablet PC’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.
T Series.book Page 87 Wednesday, April 25, 2007 11:29 AM
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