Scrabble
Scrabble has changed a lot from the days of my youth. Seems that acronyms are now an accepted part of the dictionary. I experimented with playing 'sau' (I thought there was a chance it could be an old form of 'sow' as the German for a female pig is 'sau'). The word was accepted, but when I finally found a dictionary that recognised it, the meaning given was: Secure Access Unit

no subject
http://www.absp.org.uk/words/words.html
The list is comprehensive and up-to-date. You'll find sau is in as an alternative spelling of xu.
no subject
no subject