Technology / Computers Glossary

Hertz (Hz): A measurement for frequency that is used internationally, and indicates one cycle per second.

Hexadecimal Number: A number encoded in base-16. Includes the letters A-F and 0-9. For example, the hex number 8BF3 equals 35,827 in Base-10. Base-10 is the number system we are familiar with.

Hidden File: A file that is not displayed in a directory listing because the files attribute byte is set to hide its presence.

High Memory Area: In DOS -based systems, the high memory area refers to the first 64K of extended memory.

High Speed Technology (HST): Before the invention of the CCITT V.32 modem standards for 9600 BPS modems, US Robotics invented a proprietary protocol that runs even faster at 14,400 BPS. It became popular on US bulletin . . . View Full Definition

Host: A computer on a network that provides services to other computers on the network. Unless you have your own server, you need a hosting company who provides a server or computer that is connec . . . View Full Definition

Hot Fix: Novell, Inc.'s term for the feature of their network file server operating system, Novell NetWare, which handles errors in disk write operations. The OS re-reads every block it writes to dis . . . View Full Definition

Hot Swappable: This refers to a device that is designed to be removed or replaced while a system is turned on without disturbing the computers function. A good example of a hot swappable device is the USB . . . View Full Definition

Hotlist: List of URLs saved within the Mosaic Web browser. (Bookmark in Netscape.)

Hub: A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the . . . View Full Definition

Hybrid: A device or system combining two types of mechanisms, circuits, or design approaches, each of which could of itself accomplish the total function but in a different and usually less effectiv . . . View Full Definition

Hybrid Fiber-Coxaial (HFC): Older CATV systems were provisioned using only coaxial cable. Modern systems use fiber transport from the headend to an optical node located in the neighborhood to reduce system noise. Coaxi . . . View Full Definition

Hyper-Threading: (HTT = Hyper Threading Technology) is Intel's trademark for their implementation of the simultaneous multithreading technology on the Pentium 4 microarchitecture. It is basically a more adva . . . View Full Definition

Hypertext: This is a mark-up language that allows for non-linear transfers of data. The method allows your computer to provide the computational power rather than attaching to a mainframe and waiting f . . . View Full Definition

Hypertext Markup Language (HTML): A language used to format text files on the web. HTML is based on pairs of tags that are inserted into the text and translate into text formatting, tables, graphics, links, and other common . . . View Full Definition

Hypertext Transfer Protocol (HTTP): The protocol that dictates the methods browsers and servers use to communicate over the Internet. HTTP allows a web browser to request HTML documents from a Web server.

I-O Port: An I/O Port is used to communicate to and from devices, such as a printer, disk, or keyboard. I/O ports can be anything from the plugs on the back of your computer to the ones on your mother . . . View Full Definition

Icon: A small video display that acts as an activation link when clicked on.

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