MU, Mu or µ may refer to:
Mumbai (; also known as Bombay, the official name until 1995) is the capital city of the Indian state of Maharashtra.
Muhammad (Arabic: محمد; pronounced [muħammad]; c. 570 CE – 8 June 632 CE) is the prophet and founder of Islam.
Munich (; German: München, pronounced [ˈmʏnçn̩], Bavarian: Minga [ˈmɪŋ(ː)ɐ], Czech: Mnichov) is the capital and the most populated city in the German state of Bavaria, on the banks of River Isar north of the Bavarian Alps.
Multiple sclerosis (MS) is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged.
Muammar Mohammed Abu Minyar Gaddafi (; audio ; c. 1942 – 20 October 2011), commonly known as Colonel Gaddafi, was a Libyan revolutionary, politician, and political theorist.
Muhammad Ali Jinnah (born Mahomedali Jinnahbhai; 25 December 1876 – 11 September 1948) was a lawyer, politician, and the founder of Pakistan.