MD

MD, Md, mD or md may refer to:

Places

Maryland (United States postal abbreviation MD)
Magdeburg (vehicle plate prefix MD), a city in Germany
Metropolitan division, or MD, a territory unit defined by the United States Office of Management and Budget as a county or group of counties within a metropolitan statistical area
Mödling District (vehicle plate prefix MD), in Lower Austria, Austria
Moldova (ISO country code MD)

Major Douglas (1879–1952), British Engineer and pioneer of the Social Credit economic reform movement
Muhammad (name) or Mohammed (Md)

Main droite or mano destra (MD or m.d.), used in piano scores to mark sequences of notes that are to be played with the right hand
MiniDisc, an optical storage medium developed by Sony
Music director; the term "MD" is used particularly in musical theatre

MDs (TV series), a 2002 made-for-television medical drama
Materiali e discussioni per l'analisi dei testi classici, ("Materials and discussions for the analysis of classical texts"), an Italian classics journal
Mega Drive, a game console produced by Sega

Air Madagascar (IATA airline code MD)
McDonnell Douglas (aircraft model prefix MD), a former aerospace manufacturer that later merged with Boeing

.md, Internet top-level domain for Moldova
Markdown (file extension .md), a format
mdadm (multiple device), a device driver used to support RAID in the Linux kernel
Message-digest algorithm, a cryptographic hashing function
Microdrive, a type of miniature hard drive
mkdir or md, an operating system command to create a directory

Mean absolute difference, a measure of statistical dispersion
Mendelevium (Md), a chemical element
Mesoscale discussion, a short-term technical meteorological forecast concerning convection; See Storm Prediction Center or Weather Prediction Center
Methyldichloroarsine, a blister agent used in chemical warfare
Millidarcy (mD), a unit of fluid permeability
Molecular dynamics, a method of computer simulation of molecular interaction
Membrane distillation, a process of membrane filtration

MD, 1500 in Roman numerals
Majority decision, a winning criterion in several full-contact combat sports
Man-day, amount of work performed by the average worker in one day
Managing director, a chief executive
Marque déposée (MD), an international trademarking symbol in countries where French is the dominant language; See Unicode subscripts and superscripts
Match Director (MD), person who handles the overall match administration before, after and during an International Practical Shooting Confederation match