QM may refer to:
QML (Qt Modeling Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications.
Qmusic (previously written as Q-music) is a Dutch commercial radio station which has been broadcasting since August 31, 2005. The station is owned by the Belgian media company De Persgroep.
qmail is a mail transfer agent (MTA) that runs on Unix. It was written, starting December 1995, by Daniel J.
Qmusic (formerly Q-music) is a Flemish commercial radio station of media company Medialaan. In 2016, Qmusic is the biggest commercial radio station and the third largest radio station in Flanders.
QMobile (Urdu:کیو موبائل) is a Karachi based consumer electronics company which markets smartphones in Pakistan.
Qmillion (born Keith Lewis, in the US), is a record producer, mix engineer, composer, and writer based in Los Angeles.
The hybrid QM/MM (quantum mechanics/molecular mechanics) approach is a molecular simulation method that combines the strengths of the QM (accuracy) and MM (speed) approaches, thus allowing for the study of chemical processes in solution and in proteins.