Also known as: hd.
HD has various meanings in the IT Terminology category. Discover the full forms, definitions, and usage contexts of HD in IT Terminology.
A cockpit system where data from flight instruments is projected onto a screen or the wind-screen so that the pilot can see it with-out having to look down.
IT TerminologyData transmission over a circuit capable of transmitting in either direction, but not simultaneously. Of or pertaining to two-way communi-cation that takes place in only one direction at a time. For example, transmission between half-duplex modems occurs when one modem waits to transmit until the other has finished sending.
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