V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MAU
       Medium Attachment Unit (IEEE 802.3, Transceiver)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MAU
       Medium Access Unit


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MAU
       Multistation Access Unit (Token Ring, Hub)


The Free On-line Dictionary of Computing (30 December 2018):

Media Access Unit
MAU
MSAU
Multistation Access Unit

    (MAU or Multistation Access Unit, MSAU) In a
   Token Ring network, a device to attach multiple network
   stations in a star topology, internally wired to connect the
   stations into a logical ring.  The MAU contains relays to
   short out nonoperating stations.  Multiple MAUs can be
   connected into a larger ring through their Ring In/Ring Out
   connectors.

   (1997-05-27)