DMM may refer to:
Businesses DMM Corporation (Digital Media Mart), a Japanese company which sold video games including eroge DMM.com, its later incarnation DMM Wales, a Welsh manufacturer of rock-climbing equipment
Science and technology Digital multimeter, a multi-functional electronic measuring instrument Digital Molecular Matter, a computer game physics engine developed by Pixelux Dimethylmercury, an organic compound containing mercury Direct metal mastering, a vinyl record manufacturing technology by Teldec Disease Models & Mechanisms, a journal by the Company of Biologists Dynamic-maturational model of attachment and adaptation, a transdisciplinary model describing relationship dynamics and attachment theory
Other uses Daniel Martin Moore, American singer Domestic Mail Manual, a U.S. Postal Service guide King Fahd International Airport (IATA code: DMM), Dammam, Saudi Arabia Project DMM, a Japanese music group whose work is used on TV show Dharmavaram Junction railway station (station code: DMM) in Andhra Pradesh, India