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Handheld Devices Markup Language (HDML)
An authoring language using hypertext transfer protocol that allows for the text display of Web pages on handheld devices.

Hertz
A measure of frequency equal to one cycle per second. Most radio signals operate in ranges of megahertz or gigahertz.

Hit
A single request from a web browser for something from a web server; i.e. a request for text or graphics.

Home Page
The main page of a web site. Usually, the home page features links to other pages within the site.

Host
A host computer is any machine on a network that is responsible for services received by other machines on that network.

Host Name (or Firstname)
The first portion of a host's domain name.

HTML (Hypertext Markup Language)
A language for coding text for viewing on the World Wide Web. It is unique because it enables the use of hyperlinks from one site to another. Such hyperlinks create a web.

HTTP (Hypertext Transfer Protocol)
The protocol used most frequently on the World Wide Web to move hypertext files between clients and servers on the Internet.

Hub (networking)
A centralized switch box, or a common connection point, for devices in a network. Hubs contain multiple ports that can intertransmit information in order to maximize the viewing of data. Several types of hubs exist, such as passive hubs (data conduits), intelligent or manageable hubs (hubs with additional traffic-monitoring features) and switching hubs. Switching hubs read the destination address of each packet of information and then forward the packet to the correct location.

Hub (Internet)
A comprehensive Internet site dedicated to one category of user or one niche of interest.

Hyperlink
A hyperlink is an element in an electronic document that links to another document or to another place in the same document. Generally, the user clicks on the hyperlink in order to follow it.