What does HD stand for?

Hilary Doda

Hydrographic Dept

Head Delegate

Head of Department

Hand Drawn

High Durability

Half-Duplex

Data 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.

hierarchical diagnosis

Horrible and Detrimental

Hopelessly Deaf