Dell Inspiron 3500 - Manual (Page 45)

A metal plate with metal pegs or ribs that help dissipate heat. Some microprocessors include a heat sink.
help file
A file containing descriptive or instructional information about a product that is organized and formatted for display by the Windows operating
system. Some help files are associated with a particular program, such as Help in Windows. Other help files, such as this one for your Dell
Dimension system, function as stand-alone reference sources. Help files typically have a filename extension of hlp or chm.
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. See also upper memory area and XMM.
host adapter
A host adapter implements communication between the computer's bus and the controller for a device. (Hard-disk 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.
HRTF
Acronym for head related transfer function.
Hz
Abbreviation for hertz.
I
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.
ICES
Abbreviation for Interference-Causing Equipment Standard (in Canada).
ICU
Abbreviation for ISA Configuration Utility.
IDE
Abbreviation for integrated drive electronics. See also EIDE .
IrDA
Acronym for Infrared Data Association.
IRQ
Abbreviation for interrupt request. A signal that data is about to be sent to or received by a device travels by an IRQ line to the microprocessor.
Each device connection must be assigned an IRQ number. For example, the first serial port in your computer (COM1) is assigned to IRQ4 by
default. Two devices can share the same IRQ assignment, but you cannot operate both devices simultaneously.
ISA
Acronym for Industry-Standard Architecture. A 16-bit expansion bus design. The expansion-card connectors in an ISA computer are also
compatible with 8-bit ISA expansion cards.
ISP
Abbreviation for Internet service provider. A company that allows you to dial into its host server to connect directly to the Internet.
J
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