MMM

MMM can stand for:

Multifocal Multiphoton Microscopy/Microscope
3000, in Roman Numerals
3M, an American corporation, originally Minnesota Mining and Manufacturing Company (MMM is still the company's stock ticker symbol)
The Magnificat Meal Movement, a Catholic break away group in Queensland, Australia
McKenna Mendelson Mainline, a seminal Canadian blues quartet
Member of the Order of Military Merit (Canadian decoration post-nominal letters)
Million Man March, a 1995 event in Washington, DC, spearheaded by Louis Farrakhan
Million Mom March, an American pro-gun control advocacy group formed in 2000 and now affiliated with the Brady Campaign
MMM (pyramid), a Russian company, active from 1989 to 1994, best known for perpetrating a large financial pyramid scheme
Triple M, a network of Australian radio stations owned by the Austereo Radio Network
MMM Movie making manual, a Wikibook.