Diabetes mellitus, a disease characterized by high blood sugar

Dextromethorphan, an antitussive (anti-coughing) drug that is found in many over-the-counter cold and cough preparations

Data mining, the process of automatically searching large volumes of data for patterns

Dennis Miller (born 1953), American entertainer, stand-up comedian, political and social commentator and television personality

Depeche Mode, an English electronic rock band formed in 1980.

Death metal, a musical style evolving from thrash metal

DangerMouse, a British animated television series

DM, the nation's ISO 3166-1 alpha-2 code

Deutsche Mark, former official currency of Germany used between 1948 and 2002, when it was replaced by the Euro

Direct marketing or direct mail, a type of marketing that attempts to send its messages directly to consumers.

Duel Masters Trading Card Game, a popular collectible card game in Japan, Europe, and North America

Dispersion measure, a quantity used to describe the amount of dispersion of radio waves by the interstellar medium.

Doctor of Medicine, an academic degree for medical doctors at a few English and Indian Universities

Mark der DDR (East German mark or eastern mark), former official currency of the German Democratic Republic (East Germany) used between 1951 and 1990, initially called the Deutsche Mark

Cantor's diagonal argument (diagonal method), a compositional rule of thumb in photography

Dance Marathon, a multiple-day charity event on United States college campuses to raise money for local charitable organizations

Danger Mouse (born 1977), American musical artist and producer

DrumMania, a music video game

Designated marksman, a military marksman role in a U.S. infantry squad that uses a scoped semi-automatic weapon to engage medium to long-range targets

Data mart, a specialized version of a data warehouse

Deathmatch (gaming), a widely-used gameplay mode integrated into first-person shooter computer games

Maersk Air (IATA code DM), a former Danish airline which operated from 1969 to 2005

Dungeon Master, a selected player who describes the game to the other players in the role-playing game Dungeons & Dragons

.dm, the nation's country code top-level domain

Adamsite, a chemical agent used in riot control

Device Management, a standard where users do not have to worry about managing the software on their mobile phone

Dungeon monitor, a safety official at BDSM parties

Decimetre (dm), a unit of length in the metric system

Doctor of Management (D.M.), an academic degree awarded for advanced study and research in management

HLA-DM, an intracellular protein that removes CLIP from MHC Class II during antigen processing

DM (computing), the default window system for Apollo/Domain workstations running AEGIS (Domain/OS) operating system

Dominica, an island nation in the Caribbean Sea not to be confused with the Dominican Republic