AMU
- Acute medical unit
- Adam Mickiewicz University in Poznań
- African Mathematical Union
- African and Malagasy Union
- Agency for the Modernisation of Ukraine
- Aix-Marseille University
- Aligarh Muslim University
- American Military University
- Ammu (disambiguation)
- Amu (film)
- Amu (pharaoh)
- Amu Darya
- Amu Hinamori
- Antarctic Micronational Union
- Arab Maghreb Union
- Armenian Mathematical Union
- Asian Monetary Unit
- Auxiliary Memory Units
- Ave Maria University
- Dalton (unit)
- Northern Rhodesian African Mineworkers' Union
- United States Army Marksmanship Unit
- United States Army Medical Unit