User's Manual

Glossary 217
host adapter
A host adapter implements communication between the computer'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.
hot plug
The ability to remove and replace a redundant part while the system is being used.
Also called a "hot spare."
HPFS
Abbreviation for the High Performance File System option in the Windows NT and
later Windows operating systems.
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.
Hz
Abbreviation for hertz.
ICES
Abbreviation for Interference-Causing Equipment Standard (in Canada).
ICU
Abbreviation for ISA Configuration Utility.
IDE
Abbreviation for Integrated Device Electronics. IDE is a computer system
interface, used primarily for hard drives and CDs.
I/O
Abbreviation for input/output. The keyboard is an input device, and a printer is
an output device. In general, I/O activity can be differentiated from
computational activity. For example, when a program sends a document to the
printer, it is engaging in output activity; when the program sorts a list of terms,
it is engaging in computational activity.