Dell OptiPlex GX240 User Manual

Page 283

Hot-Swappable

Indicates that a

device

can be connected to or disconnected from a computer

while the computer is running. After the hot-swappable device is connected
to the computer, the

can immediately recognize and use the device.

Hour(s). A measurement of time that equals 60

min

HTML

Hypertext Markup Language. A set of codes inserted into an Internet web page
intended for display on an Internet browser. The codes tell the browser how
to display the contents of the web page.

http

Hypertext Transfer Protocol. A protocol for exchanging files between
computers on the Internet. Each

URL

begins with http://.

Hertz. A measurement of frequency that equals 1 cycle per second.
Computers and electronic devices are often measured in kilohertz (

kHz

megahertz (

MHz

), gigahertz (GHz), or terahertz (THz).

I/O

Input/output. An operation or

device

that enters and/or extracts data from

the computer. For example, a keyboard is an input device, and a printer is an
output device.

I/O Address

An address in

RAM

that is associated with a specific

device

(such as a

serial

port

parallel port

, or

expansion slot

) and allows the

microprocessor

communicate with that device.

Industry Canada. The Canadian regulatory body responsible for regulating
emissions from electronic equipment, much as the

FCC

does in the United

States. IC polices the Canadian marketplace to ensure that equipment
manufactured in or imported into Canada meet the proper emissions limits.

Integrated circuit. A microelectronic semiconductor component consisting of
many interconnected transistors and other devices. Also called a

chip

Examples include the

microprocessor

hard-drive controller

, and

RAM

chips.