BT glossary - H

This glossary is here to help you understand some of the acronyms you may encounter in this site. Select a letter below that your word begins with.

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Abbreviation Term Definition



Originally used to describe someone with a deep and thorough understanding of computers and considerable skills and ability to program them. Misuse in the media has lead to the term becoming synonymous with 'cracker', much to the dissatisfaction of the small genuine hacker community.



Pieces of equipment including your PC or notebook computer, printer, scanner, modem, router.



A telephone permanently wired via a terminal block, not by a plug and socket arrangement.



High bit-rate Digital Subscriber Line

Provides repeaterless digital transmission at 2Mbit/s for about 12000 feet (4km) over twisted pair.


High Definition television

High Definition television means broadcast of television signals with a higher resolution than traditional formats allow. It's a step change in television technology which provides far clearer and more detailed pictures than normal "standard definition" TV.



As used in reference to the world wide web, hit means a single request from a web browser for a single item from a web server; thus in order for a web browser to display a page that contains three graphics, four hits would occur at the server; one for the basic web page, and one for each of the three graphics. Hits are often used as a very rough measure of load on a server, e.g. Our server has been getting 300,000 hits per month. Because each hit can represent anything from a request for a tiny document (or even a request for a missing document) all the way to a request that requires some significant extra processing (such as a complex search request), the actual load on a machine from one hit is almost impossible to define. Other measures include sessions, page impressions.


Home page

Several meanings. Originally, the web page that your browser is set to use when it starts up. The more common meaning refers to the main web page for a business, organisation, person or simply the main page out of a collection of web pages, e.g. "Check out so-and-so's new home page." Another use of the term refers to practically any web page as a homepage, e.g. "That web site has 65 homepages and none of them are interesting."



Any computer on a network that is a repository for services available to other computers on the network. It is quite common to have one host machine provide several services, such as WWW and USENET.



The BT Wireless Home Hub is a fully featured modem, router and wireless hub that lets you share your broadband connection with other family or household members. It lets you do this across a range of devices - both wired and wireless. It also connects your BT Fusion phone when you are home.



Highlighted text, image or icon which when clicked upon takes the user to further information (sound, text image, animation or video).



HyperText Markup Language

The coding language used to create Hypertext documents for use on the world wide web. HTML looks a lot like old-fashioned typesetting code, where you surround a block of text with codes that indicate how it should appear. Additionally, in HTML you can specify that a block of text, or a word, is linked to another file on the Internet. HTML files are meant to be viewed using a world wide web client program, such as Netscape Navigator or Internet Explorer.



HyperText Transport Protocol

The protocol for moving hypertext files across the internet. Requires a HTTP client program on one end, and an HTTP server program on the other end. HTTP is the most important protocol used in the world wide web (WWW).