Users Guide

Glossary 103
flash memory
A type of EEPROM chip that can be reprogrammed
from a utility on diskette while still installed in a
system; most EEPROM chips can only be rewritten
with special programming equipment.
format
To prepare a hard drive or diskette for storing files. An
unconditional format deletes all data stored on the disk.
FRU
Abbreviation for field replaceable unit, which identifies
a module or component that will typically be replaced
in its entirety as part of a field service repair operation.
function commands
Commands that specify an action to be performed.
GB
Abbreviation for gigabyte(s). A gigabyte equals
1024 megabytes or 1,073,741,824 bytes.
graphics mode
A video mode that can be defined as x horizontal by y
vertical pixels by z colors.
GUI
Acronym for graphical user interface.
GUID
Abbreviation for Globally Unique Identifier, which is
a random number used in software applications. Each
generated GUID is supposed to be unique.
h
Abbreviation for hexadecimal. A base-16 numbering
system, often used in programming to identify
addresses in the system's RAM and I/O memory
addresses for devices. The sequence of decimal
numbers from 0 through 16, for example, is expressed
in hexadecimal notation as: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A,
B, C, D, E, F, 10. In text, hexadecimal numbers are
often followed by h.
HBA
Abbreviation for host bus adapter. A PCI adapter card
that resides in the system whose only function is to
convert data commands from PCI-bus format to
storage interconnect format (examples: SCSI, Fibre
Channel) and communicate directly with hard drives,
tape drives, CD drives, or other storage devices.
HMA
Abbreviation for high memory area. The first 64 KB of
extended memory above 1 MB. A memory manager
that conforms to the XMS can make the HMA a direct
extension of conventional memory. Also see XMM.
host adapter
A host adapter implements communication between
the system's bus and the controller for a peripheral
device. (hard drive controller subsystems include
integrated host adapter circuitry.) To add a
SCSI expansion bus to your system, you must install or
connect the appropriate host adapter.
HTTP
Abbreviation for Hypertext Transfer Protocol. HTTP
is the client-server TCP/IP protocol used on the World
Wide Web for the exchange of HTML documents.
HTTPS
Abbreviation for HyperText Transmission Protocol,
Secure. HTTPS is a variant of HTTP used by Web
browsers for handling secure transactions. HTTPS is a
unique protocol that is simply SSL underneath HTTP.
You need to use "https://" for HTTP URLs with SSL,
whereas you continue to use "http://" for HTTP URLs
without SSL.
ID
Abbreviation for identifier, commonly used when
referring to a user identifier (user ID), object identifier
(object ID), or hardware identifier (controller ID).
IDE
Abbreviation for Integrated Drive Electronics. IDE is
a computer system interface, used primarily for hard
drives and CDs.