MM

MM or variants may refer to:

Alphabets

 * Meitei Mayek or Meetei Mayek, the writing system of Meitei language

Music

 * MM (album), 1989, by Marisa Monte
 * Maelzel's metronome, a music marking
 * Marilyn Manson, an American musician
 * Marshall Mathers, an American rapper (a.k.a. "Eminem")
 * Master of Music, an academic degree
 * Melody Maker British music publication
 * "MM", a 1993 song by Mr. President

Television

 * MM (TV channel), Bulgaria
 * MM, the production code for the 1967 Doctor Who serial The Tomb of the Cybermen

Other media

 * MM!, a Japanese light novel, manga and anime series by Akinari Matsuno
 * Media Molecule, a video game developer in England
 * Monster Manual, a 1977 Dungeons & Dragons source book
 * Mother's Milk (character), aka "MM", a fictional character in The Boys comicbook franchise

Businesses, organizations, and teams

 * Middle-market company or mid-market companies have annual revenues of $50 million to $1 billion or between 100 and 1000 employees
 * Maryknoll, a Catholic religious institute
 * Maybach-Motorenbau GmbH and Maybach-Manufaktur and Mercedes-Maybach; an engine and car marque
 * Moderation Management, alcohol support group
 * Mumbai Magicians, a defunct Hockey India League franchise
 * Peach (airline) (IATA code: MM)
 * SAM Colombia (former IATA code: MM)
 * MM, logo of the Leipzig Trade Fair abbreviation for Mustermesse (English: Sample fair)

Degrees, honorifics, and titles

 * Machinist's Mate in the US Navy
 * Master mariner
 * Master of Management, a degree
 * Master of Medicine, a degree
 * Master of Music, a degree
 * Military Medal, British and Commonwealth
 * Minister Mentor, a Singapore cabinet position
 * messieurs, a plural honorific in French

Latinisms

 * 2000 (number) in Roman numerals
 * The year 2000 in Roman numerals
 * Mutatis mutandis ("m.m."), "with things changed that should be changed"

Transportation

 * MM (New York City Subway service), a former New York City Subway service

Places

 * Metro Manila, the Philippines' national capital region
 * Mega Manila, its larger metropolis
 * Myanmar (ISO 3166-1 country code: MM)

Computing

 * .mm, Internet country code top-level domain for Myanmar
 * ".mm", the file extension for FreeMind and Freeplane data files
 * ".mm", the file extension for source code files of Objective-C++
 * mm tree, the Andrew Morton's Linux kernel tree
 * MM algorithm, an iterative method for constructing optimization algorithms
 * Columbia MM, an early e-mail client
 * Multiple master fonts
 * Mattermost, an online chat service

Units of measurement

 * Megametre (Mm) (rare) 1,000km
 * Mile Marker (MM)
 * Millimetre (mm)
 * Millimolar (mM), a unit of concentration of a solution
 * Momme, a unit of textile measurement
 * One million (MM), used in reference to currency
 * Percent concentration by mass (m/m%, %m/m, or m%), a unit of relative mass concentration

Other uses in science, technology, and mathematics

 * Minimax or maximin, a decision rule
 * Modified Mercalli scale for earthquake intensity
 * Molecular mechanics, computational chemistry technique
 * Moving magnet, phonograph cartridge type
 * Moving mean in statistics
 * Multiple myeloma, blood cancer
 * Mischmetal, alloy of similar lanthanoids