MHD

MHD has the following meanings:

*MHD, former name of the HDTV network for MTV, VH1, and CMT now known as Palladia (MTV Networks)
*Doctor of Marine Histories (DMH) (formerly Marine Histories Doctorate or MHD), such as issued by Sea Research Society's College of Marine Arts
*Massachusetts Highway Department
*Mental Health Day
*Magnetohydrodynamics
*Malteser Hilfsdienst, an ambulance service, working mainly in Germany and Austria, Catholic sister-organization of St. John Ambulance

*Micro Holographics Disc, a new (2007) optical disc storage media used for data storage. "Microholas Project" at the Berlin University developed this new holographic media. Currently it is able store about 500 GB with a sustained transfer rate of about 50 Mbit/s. In the 2010 it will be able to store about 1 TB with a transfer rate of 200 Mbit/s.