Appendix H - Glossary
161
data-delivering data at a guaranteed rate. This makes it ideal
for devices that need to transfer high levels of data in real-
time, such as video devices. Although extremely fast and
flexible, firewire is also much more expensive than a
competing external bus standard called Universal Serial Bus
(USB). Like USB, firewire supports both Plug-and-Play and
hot plugging.
Floppy Diskette Drive (FDD)
The storage of a standard diskette is 720kb, 1.2MB (Japan
only), 1.44MB and 120 MB. Also see LS-120 and ZIP for new
diskette types.
Format
Preparing a diskette (floppy or HDD) for use with a DOS, this
erases all the information.
Hard Disk Drive (HDD)
An internal or external, high-capacity, high-storage medium.
Available is IDE or SCII, it has considerably high storage
capabilities than floppy, ZIP or JAZ storage.
IDE
Integrated Drive Electronics. A protocol and circuitry for
communication between a computer and a Hard Drive.
Currently the most popular type of hard drive used in PCs. A
standard IDE adapter can handle a maximum of two hard
drives total.
I/O Port
An Input / Output connector that allows external and some
internal peripherals to communicate with the computer
system (i.e., serial ports and parallel ports).
IRQ
Interrupt Request. Every device has an assigned IRQ
number; if two devices share the same number there will be a
conflict and none of the devices will work.
ISA
A standard for 8 and 16-bit expansion cards, this standard is
also referred as AT-bus. The speed on the bus is 8MHz.
Isochronous
Equal in duration; Characterized by or occurring at equal
intervals of time.
Joystick
This input device plugs into the game/midi port and allows
you to control elements of some computer games.
Jumper
On a printed circuit board: a patch cable or wire used to
establish a circuit. For example, jumpers are often needed to
configure multi-HDD sequence.
KB
Kilo Byte (1024 bytes).
LAN
Local Area Network. LANs are data communications
networks which are geographically limited, allowing easy
interconnection of terminals, microprocessors and computers
within adjacent buildings.There are many different standards
for LAN, such ETHERNET and Token ring.
LBA
Enabling LBA causes Logical Block Addressing to be used in
place of cylinders, heads and sectors, this can be done in the
BIOS.
LCD
Liquid Crystal Display. A type of display used in many
portable computers. LCD displays utilize two sheets of
polarizing material with a liquid crystal solution between
them. Color LCD displays use two basic techniques for
producing color: Passive matrix is the less expensive of the
two technologies, but its colors are not particularly sharp and
it has slow reaction times. The other technology, called thin
film transistor (TFT) or active-matrix, produces color images
that are as sharp as traditional CRT displays, but the
technology is expensive.
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