MMF may refer to: Medicine Mismatch field, a brain response measured in magnetoencephalography Mycophenolate mofetil (tradename CellCept), an immunosuppressant drug used to prevent rejection in organ transplantation Science and technology Magnetomotive force Methoxymethylfurfural, an intermediate in the production of renewable plastics and biofuels Micro-mechanics of failure, a failure theory for fiber reinforced composites micro-microfarad, (MMF or μμF), an obsolete unit of capacitance, equivalent to a picofarad Multi-mode optical fiber Computing Memory-mapped file, a segment of virtual memory which has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource Minimum Marketable Feature, in software engineering, the smallest set of functionality that must be delivered in order for the customer to perceive value .mmf, a file extension used for Synthetic Music Mobile Application Format polyphonic ring tones Multimedia Filter, a filter used to reduce Suspended Solids Multimedia Fusion and Multimedia Fusion 2, software authoring tools from Clickteam Multimedia framework, a software framework that handles media Multiple master fonts, a format for fonts Organizations and events Manitoba Métis Federation Masterclass Media Foundation, a UK nonprofit Mercy Ministries Foundation, a Christian charitable organization Mnet Music Video Festival Meredith Music Festival Myna Mahila Foundation, an Indian charitable foundation Music Managers Forum Economics and finance Money market fund, an open-ended mutual fund that invests in short-term debt securities such as US Treasury bills and commercial paper Master of Mathematical Finance, a degree focusing quantitative analysis and mathematical finance Master of Money and Finance, a master's degree offered by the House of Finance at Goethe University Frankfurt, Germany Other "Make Money Fast!", an email spam that has persisted on the Internet since at least 1988 Male-male-female, a type of threesome involving two males and one female Memphis May Fire, an American metalcore band Mamfe Airport, Cameroon (by IATA code) Mundat language (by ISO 639 code)