Science, technology, and medicine

• Magnetomotive force
  Magnetomotive force
  Magnetomotive force is any physical driving force that produces magnetic flux. In this context, the expression "driving force" is used in a general sense of "work potential", and is analogous, but distinct from force measured in newtons...
  
  
• Methoxymethylfurfural
  Methoxymethylfurfural
  Methoxymethylfurfural , also 5-methoxymethylfuran-2-carbaldehyde, is an organic compound derived from dehydration of sugars and subsequent etherification with methanol. This colourless liquid is soluble in a wide range of solvents including lower alcohols. The molecule is a derivative of furan,...
  
  , an intermediate in the production of renewable plastics and biofuels
• Micro-Mechanics of Failure
  Micro-Mechanics of Failure
  Micro-Mechanics of Failure is a newly proposed methodology, providing a more logical explanation of failure mechanism of continuous fiber reinforced composites than other phenomenological models such as Tsai-Wu and Hashin failure criteria...
  
  , a failure theory for fiber reinforced composites
• Mismatch field, a brain response measured in magnetoencephalography
• MMF file
  Synthetic Music Mobile Application Format
  Synthetic-music mobile application format, abbreviated SMAF, is a music data format specified by Yamaha for portable electronic devices, such as cell phones and PDAs. The file extension for SMAF is .MMF and is common as ringtones for mobile phones with one of five sound chips.SMAF resembles MIDI,...
  
  , a file extension used for SMAF polyphonic ring tones
• Multimedia Fusion, a software authoring tool from Clickteam
• Multimedia Fusion 2, the sequel to MMF 1 (above)
• Multi-mode optical fiber
  Multi-mode optical fiber
  Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus...
  
  
• Multimedia Framework
  Multimedia framework
  A multimedia framework is a software framework that handles media on a computer and through a network. A good multimedia framework offers an intuitive API and a modular architecture to easily add support for new audio, video and container formats and transmission protocols...
  
  , is a software framework
  Software framework
  In computer programming, a software framework is an abstraction in which software providing generic functionality can be selectively changed by user code, thus providing application specific software...
  
   that handles media
  Electronic media
  Electronic media are media that use electronics or electromechanical energy for the end-user to access the content. This is in contrast to static media , which today are most often created electronically, but don't require electronics to be accessed by the end-user in the printed form...
  
  
• Multiple master fonts
  Multiple master fonts
  Multiple master fonts are an extension to Adobe Systems' Type 1 PostScript fonts, now mostly superseded by the advent of OpenType...
  
  , a format for fonts
• Minimum Marketable Feature, an Agile software development
  Agile software development
  Agile software development is a group of software development methodologies based on iterative and incremental development, where requirements and solutions evolve through collaboration between self-organizing, cross-functional teams...
  
   concept borrowed from Economics
• Mycophenolate mofetil
  Mycophenolate mofetil
  Mycophenolate mofetil is an immunosuppressant and prodrug of mycophenolic acid, used extensively in transplant medicine. It is a reversible inhibitor of inosine monophosphate dehydrogenase in purine biosynthesis, which is necessary for the growth of T cells and B cells...
  
   (tradename CellCept), an immunosuppressant drug used to prevent rejection in organ transplantation
• Maxillomandibular fixation (An immobilisation technique in the maxillofacial area)
• Mineral-Matter Free, a measure of the heat-content of fuel without ash or sulfur
• Multi media forum

Organizations and events

• Mercy Ministries Foundation, a Christian charitable organization
• Meredith Music Festival
  Meredith Music Festival
  The Meredith Music Festival is a three-day outdoor music festival held every December at the Supernatural Amphitheatre, a natural amphitheatre located on private farmland near the town of Meredith in Victoria, Australia...
  
  

Economics and finance

• Money Market Fund
  Money fund
  A money market fund is an open-ended mutual fund that invests in short-term debt securities such as US Treasury bills and commercial paper. Money market funds are widely regarded as being as safe as bank deposits yet providing a higher yield...
  
   a kind of fund investing in money markets.
• Masters of Mathematical Finance, a professional post graduate degree focusing on financial engineering and mathematical finance
  Mathematical finance
  Mathematical finance is a field of applied mathematics, concerned with financial markets. The subject has a close relationship with the discipline of financial economics, which is concerned with much of the underlying theory. Generally, mathematical finance will derive and extend the mathematical...
  
   at the University of Toronto
  University of Toronto
  The University of Toronto is a public research university in Toronto, Ontario, Canada, situated on the grounds that surround Queen's Park. It was founded by royal charter in 1827 as King's College, the first institution of higher learning in Upper Canada...
  
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Other

• "Make money fast
  Make Money Fast
  "MAKE.MONEY.FAST" is a title of an electronically forwarded chain letter which became so infamous that the term is now used to describe all sorts of chain letters forwarded over the Internet, by e-mail spam or Usenet newsgroups...
  
  !", an email spam that has persisted on the Internet since at least 1988
• MMF, an acronym for group sex
  Group sex
  Group sex is sexual behavior involving more than two participants. Group sex can occur amongst people of all sexual orientations and genders...
  
   between two males and one female, commonly referred to as bisexual pornography in pornography
• Murder Most Foul
  Murder Most Foul
  Murder Most Foul is the third of four films made by MGM loosely based on novels by Agatha Christie and starring Margaret Rutherford as Miss Jane Marple, Bud Tingwell as Inspector Craddock, and Stringer Davis as Mr Stringer. The story is ostensibly based on the novel Mrs McGinty's Dead, but notably...
  
  , a 1964 film based on the novels of Agatha Christie, starring Margaret Rutherford as Miss Jane Marple
• Memphis May Fire
  Memphis May Fire
  Memphis May Fire is an American post-hardcore band currently based in Texas. Since its formation, the band has released two EPs and two full-length albums. Their music has been compared to Underoath and He Is Legend...
  
  , a post-hardcore
  Post-hardcore
  Post-hardcore is a genre of music that developed from hardcore punk, itself an offshoot of the broader punk rock movement. Like post-punk, post-hardcore is a term for a broad constellation of groups...
  
  band