Look: https://www.teamunify.com/Home.jsp?team=guswat
       http://csconferences.mah.se/swat2018/  
       https://swat.tamu.edu
 
 So I think that every abbreviation combination is already used not once in different things or companies. May be we should stay true to us! to be 'SWATCoin' and use 'SWAT' as a simbol for exchanges!