MAU

MAU may refer to:


 * Makeup air unit, a type of air handler that only conditions outside (not recirculated) air
 * Marine Amphibious Unit, a former term for a marine expeditionary unit, the smallest air-ground task force in the United States Fleet Marine Force
 * Medical Assessment Unit, or acute assessment unit, a short-stay department in some British, Australian, and New Zealand hospitals that may be linked with the emergency department

Computing:
 * Media Access Unit (or Multistation Access Unit), an interconnecting device used in a token ring network with a star topology
 * Medium Attachment Unit, a transceiver in an Ethernet network

Entertainment:
 * Massively Armored Unit, a piece in the multiplayer game RF Online.

Statistics:
 * Monthly Active Users, a performance metric for the success of an internet product

Places:
 * MAU, National Rail code for Mauldeth Road railway station in Manchester, UK

Organizations
 * Marathwada Agricultural University, former name of Vasantrao Naik Marathwada Krishi Vidyapeeth, an agriculture university in Parbhani, India
 * Mizhnarodni Avialiniyi Ukrayiny (Ukraine International Airlines)
 * Musashino Art University, a university in Kodaira, western Tokyo

Science:
 * mAU is the milli-absorbance unit, or 0.001 absorbance units (AU), used to measure absorbance