Mx

from WordNet (r) 3.0 (2006)

Mx
    n 1: a cgs unit of magnetic flux equal to the flux perpendicular
         to an area of 1 square centimeter in a magnetic field of 1
         gauss [syn: {maxwell}, {Mx}]

from The Collaborative International Dictionary of English v.0.48

Mx \Mx\ prop. n.
   The symbol for the maxwell, a cgs unit of magnetic flux.

   Syn: maxwell.
        [WordNet 1.5]

from The Free On-line Dictionary of Computing (8 July 2008)

Mail Exchange Record
MX
MX Record

   <messaging> (MX Record) A {DNS} resource record type that says
   which {SMTP} server handles {electronic mail} for a particular
   {domain}.  E.g. the MX record

    foo.co.uk. 1054 IN MX 10 mail.foo.co.uk.

   means that mail for an address like "[email protected]" should
   be sent to "mail.foo.co.uk".

   There can be several servers for a domain.  The "10" is a
   priority - the server with the lowest number will be tried
   first.

   (2007-01-29)

from The Free On-line Dictionary of Computing (8 July 2008)

mx

   <networking> The {country code} for Mexico.

   (1999-01-27)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

MX
       Mail eXchange (Unix)