mu

MU may refer to:

• Mu (letter), Μ or μ, a letter in the Greek alphabet
• Mu (kana), む or ム, a Japanese kana
• Mu (negative), , a term and concept in Buddhism

.mu is the Internet country code top-level domain (ccTLD) for Mauritius. It is administered by the Mauritius Network Information Centre and registrations are processed via accredited registrars. Some registrars market it as the .music and .museum TLD.

MU* is an abbreviation which refers collectively to a family of text-based multi-user virtual world servers comprising:

• TinyMUD
• MUSH
• MOO
• TinyMUCK
• and related, less-notable types; see the TinyMUD family tree for more

Mu (uppercase Μ, lowercase μ; Ancient Greek  , Modern Greek μι or μυ ) is the 12th letter of the Greek alphabet. In the system of Greek numerals it has a value of 40. Mu was derived from the Egyptian hieroglyphic symbol for water (𓈖), which had been simplified by the Phoenicians and named after their word for water, to become(mem). Letters that arose from mu include the Roman M and the Cyrillic М.