Operating instructions

handshaking A procedure performed by modems, terminals, and computers
to verify that communication has been correctly established.
hang When a computer freezes so that it does not respond to keyboard com
-
mands, it is said to “hang” or to have “hung.”
hang time The number of seconds a too-often-hung computer is airborne
after you have thrown it out a second-story window.
hard drive A data-recording system using solid disks of magnetic material
turning at high speeds to store and retrieve programs and data in a computer.
hardware Physical computer equipment such as electrical, electronic, mag
-
netic, and mechanical devices. Anything in the computer world that you can
hold in your hand. A floppy drive is hardware; Microsoft Word is not.
hardware profile A list of devices that Windows automatically enables or dis-
ables in the Device Manager, depending on what devices the system detects.
hardware protocol A hardware protocol defines many aspects of a network,
from the packet type to the cabling and connectors used.
Hayes command set A standardized set of instructions used to control
modems.
HCL (Hardware Compatibility List) Now part of Windows Marketplace, a list
that is maintained by Microsoft that includes all the hardware that is supported
by an operating system. This list is helpful to use when upgrading a system; with
a quick glance, you can make sure that support is available for all the devices in a
system before you begin the upgrade.
HD (Hi-Definition) A multimedia transmission standard that defines high-
resolution images and 5.1 sound.
HD DVD An optical disc format that stores 15 or 30 GB of data, designed to be
the replacement media for DVD. Competes with Blu-ray Disc.
HDMI (hi-definition multimedia interface) A single multimedia connection
that includes both high-definition video and audio. HDMI also contains copy
protection features.
32 MIKE MEYERS’ A+ CERTIFICATION PASSPORT
Passport / Mike Meyers‘ A+ Certification Passport / Meyers / 226308-3 / Glossary
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