Mauritius' ISO 3166-1 alpha-2 country code

Musician, an enlisted rating in the United States Navy

Manchester United Football club

Mirror Universe (Star Trek), fictional parallel universe in which the plots of several Star Trek television episodes take place

Plasticity · Hooke's lawRheology ·...

Miami University, a public university in Oxford, Ohio

A degree of membership from a fuzzy set.

Aries Mu, a character from the cartoon Saint Seiya

Marquette University

University of Missouri, a public university in Columbia, Missouri

Mu Online, an online role-playing game

The muon, an elementary particle

The magnetic dipole moment

Mu (unit of area) (亩/畝), a Chinese unit of area

Marshall University

Mu La Flaga, a character from the anime Mobile Suit Gundam SEED

University of Mumbai, formerly called the University of Bombay

China Eastern Airlines's IATA code

Lemuria, a hypothetical lost continent

The chemical potential

Mu (lost continent), a mythical continent in the Pacific Ocean subsequently appearing in several books, films, and games

Isuzu MU Wizard

Multiple unit, such as a rail diesel car

The arithmetic mean of a statistical population

Magic-User, a class type in D&D, HackMaster, and many fantasy RPGs

The coefficient of friction

Micron Technology

The Mothers' Union, global Anglican women's organisation

Mahidol University, a University in Thailand

Millersville University of Pennsylvania

Manipal University, a university in Karnataka, India

The Möbius function

The least-fixed-point-operator

Mu (letter), Μ or μ, a letter in the Greek alphabet pronounced "mew" (/mju/). μ is used as a symbol for:

The standard gravitational parameter

Mu (rocket), a Japanese rocket

Mu (negative) (無), a Japanese word important in Zen koan practice

The permeability (electromagnetism) coefficient

MU (70's band), an early 1970s psychedelic group led by Merrell Fankhauser and Jeff Cotton

MU puzzle, a puzzle in Gödel, Escher, Bach

Reduced mass

Mu Dan, Chinese poet and translator

Mu-metal, an alloy used for screening magnetic fields

Muonium's atomic symbol

Centimorgan or "map unit", a unit of recombinant frequency in genetics

Groupe Mu, an interdisciplinary Belgian group focusing on linguistics and rhetoric

Mu (kana), represented by the Japanese kana む or ム

The linear density

MU (00's band), a 00's electro-punk group made up of producer Maurice Fulton and his wife Mutsumi Kanamori.

The mobility coefficient

Monitor unit, a unit used in radiation therapy

The SI prefix micro, denoting a factor of 10⁻⁶ (one millionth).

μ by itself is often used as the "unit" of strain, though in this context it retains its SI prefix meaning, which is interchangeable with "x 10⁻⁶" or "ppm" (parts per million).

μ by itself is a deprecated abbreviation for the deprecated unit micron. The preferred terms are µm and micrometre

μZiq, An alias of Mike Paradinas.