Fujitsu Lifebook N3520 User Manual page 98

L i f e B o o k N S e r i e s N o t e b o o k – S e c t i o n N i n e
Data
The information a system stores and processes.
DC
Direct current. A voltage or current that does not
fluctuate periodically with time.
DDR
Double Data Rate. A memory module design that allows
data transfer between memory and processor at a rate
that is double the bus rate. Faster transfer enhances
application and multimedia performance. DDR
modules are typically used in high performance PCs.
Default Value
A pre programmed value to be used if you fail to set
your own.
DIMM
Dual-in-line memory module.
disk
A spinning platter of magnetic data storage media. If the
platter is very stiff it is a hard drive, if it is highly flexible
it is a floppy disk, if it is a floppy disk in a hard housing
with a shutter it is commonly called a diskette.
Disk Drive
The hardware which spins the disk and has the heads
and control circuitry for reading and writing the data
on the disk.
Diskette
A floppy disk in a hard housing with a shutter.
DMA
Direct Memory Access. Special circuitry for memory to
memory data transfers which don't 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.
DVD
Digital Video Disc. A type of CD-ROM that holds up to
4.7 GB of data, enough for a full-length movie. DVDs
are backward-compatible with CD-ROMs, so that DVD
players can play old CD-ROMs, video CDs, and new
DVD-ROMs.
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DVD-R
Digital Video Disc - Readable. DVD-R discs can be
written to only once, then read. DVD-R discs hold up to
4.7 GB of data.
DVD-RW
DVD Read-Write. DVD-RW allows you to edit home
movies. DVD-RW discs are designed to be compatible
with existing players and drives. Discs are recordable
over 1,000 times, and hold up to 4.7 GB of data.
ECP
Extended Capability Port. A set of standards for high
speed data communication and interconnection
between electronic devices.
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.
ExpressCard
The ExpressCard is a new technology from the PCMCIA
group that is a smaller, faster card solution. There are
two different width ExpressCards: 34 mm and 54 mm,
both of which use the same size connector. The Express-
Card design is much faster than typical PC cards, and
can transfer data at a theoretical 250 Mbps in both direc-
tions as compared to the PC card speed of 132 Mbps.
Extended Memory
All memory more than the 640 KB 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 hexa-
decimal = 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.