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

HDCD
High Definition Compatible Digital. A compact disc coding system that provides better quality of sound.

HSCSD
High Speed Circuit Switched Data (HSCSD) is an enhancement of data services (Circuit Switched Data - CSD) of all current GSM networks. It allows you to access nonvoice services at 3 times faster, which means subscribers are able to send and receive data from their portable computers at a speed of up to 28.8 kbps

HT
High-tension meaning high voltage

HTML
Hypertext mark-up language. The computer language web pages are written in. You do not need to learn to write HTML code, as there are inexpensive software packages that will do the coding for you, behind the scenes. Variants, such as DHTML and XML, are now becoming more popular types of code. Pages written in these new formats can be used in newer internet browsers.

HTTP
HyperText Transport Protocol. The communications mechanism used to exchange information on the Internet.

Hz
Hertz. A unit of frequency equal to one cycle per second