Dell Latitude C540 - Manual (Page 162)

H
hard drive - A drive that reads and writes data on a hard disk. The terms hard drive and hard disk are
often used interchangeably.
heat sink - A metal plate on some microprocessors that helps dissipate heat.
help file - A file that contains descriptive or instructional information about a product. Some help files are
associated with a particular program, such as Help in Windows 2000. Other help files function as stand-alone
reference sources. Help files typically have a filename extension of .hlp or .chm.
hibernate mode - A power management feature that saves everything in memory to a reserved space on
the hard drive, and then turns off the computer. When you restart the computer, the memory information
that was saved to the hard drive is automatically restored.
Hz - hertz
A unit of frequency measurement that equals 1 cycle per second. Computers and electronic devices are often
measured in kilohertz (kHz), megahertz (MHz), gigahertz (GHz), or terahertz (THz).
I
IEEE 1394 - Institute of Electrical and Electronics Engineers, Inc.
A high performance serial bus used to connect IEEE 1394-compatible devices, such as digital cameras and
DVD players, to the computer.
I/O - input/output
An operation or device that enters and extracts data from your computer. Keyboards and printers are I/O
devices.
IrDA - Infrared Data Association
A standards organization that developed the specifications for infrared communication.
IR sensor - infrared sensor
A port that allows you to transfer data between the computer and IR-compatible devices without using a
cable connection.
ISP - Internet service provider
Any company that allows you to access its host server to connect directly to the Internet. The ISP gives you