HardwareSet of physical components (electronic, magnetic and mechanical) or systems, such as a computer.
Harmonised StandardTechnical specification adopted by a standardising body recognised by a mandate from the European Commission. It conforms to the applicable procedures and aims to establish European requisite. Compliance is not mandatory.
HDTV - High Definition TVEnhanced television system which provides a significant improvement to image quality, through the use of higher resolution (essentially four times higher than Standard Definition), and also provides 16:9 format viewing, which allows a field of vision that is more adapted to the human eye. It is often associated with multichannel sound, also with improved quality.
Hertz (HZ)Unit of frequency equal to a complete cycle of one wave per second. One kilohertz is equivalent to 1,000 cycles per second (cps), one Megahertz to one million cps and one Gigahertz to 1 billion cps.
Hertzian BeamTransmission system by the propagation of electromagnetic waves through the atmosphere using parabolic antennas.
High ResolutionTerm to describe the detail and superior quality of an image. Measured in respect of the number of pixels used to create the image. The higher the number of pixels, the better the image.
High Speed Circuit Switched Data (HSCSD)Evolution of the GSM system which enables transmission at speeds of up to 57 Kbps.
Higher Telecommunications Equipment RoomInstallation room of the equipment for receiving and processing sound and television signals of Types A and B and fixed connections via radio (FWA).
Higher Telecommunications SpaceIn portuguese, Espaço de Telecomunicações Superior (ETS). Room, compartment, closet or box of restricted access, for the installation of equipment and establishment of connections for the reception and processing of sound and televised signals of types A, B and FWA.
HostComputer of the Internet access supplier. It may be accessed through a terminal if it is connected to the network of an institution with a central computer directly connected to the Internet. The host of the Internet access supplier may also be accessed through a modem.
HSCSD - High Speed Circuit Switched DataEvolution of the GSM system which enables transmission at speeds of up to 57 Kbps.
HTML - Hyper-Text Mark-up LanguageProgramming language used to develop and present sites on the World Wide Web in the form of Hyper-text. It is the language used by programmers to design pages on the World Wide Web.
HTTP - Hyper-Text Transport ProtocolNetwork protocol used to move hyper-text files on the World Wide Web.
Hyper-textText which, in electronic documents, links to other documents. To follow this link, the user only needs to click the mouse button on the highlighted words (for example, underlined and in blue letters).
HZ - HertzUnit of frequency equal to a complete cycle of one wave per second. One kilohertz is equivalent to 1,000 cycles per second (cps), one Megahertz to one million cps and one Gigahertz to 1 billion cps.