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LifeBook P7000 Notebook – Section Nine
Diskette
A floppy disk in a hard housing with a shutter.
DMA
Direct Memory Access. Special circuitry for memory
to memory transfers of data which do not require
CPU action.
DMI
Desktop Management Interface. A standard that
provides PC management applications with a common
method of locally or remotely querying and configuring
PC computer systems, hardware and software compo-
nents, and peripherals.
DOS
Disk Operating System (MS-DOS is a Microsoft Disk
Operating System).
Driver
A computer program which converts application and
operating system commands to external devices into the
exact form required by a specific brand and model of
device in order to produce the desired results from that
particular equipment.
ESD
Electro-Static Discharge. The sudden discharge of elec-
tricity from a static charge which has built-up slowly.
Example: the shock you get from a doorknob on a dry day
or the sparks you get from brushing hair on a dry day.
Extended Memory
All memory more than the 640KB recognized by
MS-DOS as system memory.
FCC
Federal Communication Commission.
Floppy Disk
A spinning platter of magnetic data storage media which
is highly flexible.
GB
Gigabyte.
Hard drive
A spinning platter of magnetic data storage media where
the platter is very stiff.
Hexadecimal
A decimal notation for the value of a 4 bit binary
number. (0-9, A, B, C, D, E, F) Example: 2F in
hexadecimal = 00101111 in binary = 47 in decimal.
I/O
Input/Output. Data entering and leaving your LifeBook
notebook in electronic form.
I/O Port
The connector and associated control circuits for data
entering and leaving your LifeBook notebook in elec-
tronic form.
IDE
Intelligent Drive Electronics. A type of control interface
for a hard drive which is inside the hard drive unit.
IEEE 1394
The IEEE 1394 (also known as “Firewire” or “iLink”)
standard allows you to connect devices that are
compliant with IEEE standard 1394. This port is effec-
tively a very fast communications port. This architecture
is very good for transferring large files, such as those
from digital cameras.
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.
MB
Megabyte.
Megahertz
1,000,000 cycles per second.
Memory
A repository for data and applications which is readily
accessible to your LifeBook notebook CPU.
MHz
Megahertz.
Modem
A contraction for MOdulator-DEModulator. The
equipment which connects a computer or other data
terminal to a communication line.
P7230-B5FJ-2471-02EN-00.book Page 102 Wednesday, October 10, 2007 11:19 AM