1. 
   MRM
   Most Recently-Used Master
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   MRM
   Series of smart projectiles [US]
   Found op http://www.jedsite.info/index.html
   
   
3. 
   MRM
   Magnetic Resonance in Medicine [periodical, périodique]
   Found op http://www.encyclo.co.uk/local/20895
   
   
4. 
   mrm
   1) Most recently-used master
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/mrm/1
   
   

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