[ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9 ]

Half Duplex: Data transfer that only sends or receives data to a node. Hubs commonly perform in half duplex mode.

HDD: Hard Disk Drive - Also known as hard drive, it is a mechanical deviced used to store information on your computer. Information is stored on spinning discs magnetically. Usually your main hard drive is known as your "C" drive in Windows Explorer or My Computer.

Heatsink: Metal device used to cool processors and other components by means of convection or forced air.

Hop: When accessing a WAN or Internet, data packets often have to travel through several places to reach it's destination, each place the packet lands on is called a hop.

Hot Plugging: The ability to add and remove devices to a computer while the computer is running and have the operating system automatically recognize the change. Two external bus standards -- Universal Serial Bus (USB ) and IEEE 1394 -- support hot plugging. This is also a feature of PCMCIA.

Hot Swapping: A method in which devices are plugged and unplugged into a computer, usually referring to USB, IEEE, 1394, and similar devices.

HSF: Heatsink and Fan combination.

HTML: HyperText Markup Language - The authoring language used to create documents on the World Wide Web. HTML defines the structure and layout of a Web document by using a variety of tags and attributes. This allows the HTML to be read as your reading this now, as a web page.

Hub: Network device that joins all the network devices centrally in a star configuration.

HyperTransport: The new name for LDT, or Lightning Data Transport. Jointly developed by AMD and API as a replacement to the aging PCI bus.

Hz: Hertz - unit of measurement for Frequency.