So every class/job has a three letter abbreviation. Unlike FFXI, the class is no longer Thief (THF) and is now Rogue, so what shall the abbreviation be?
Choices are:
ROG
ROU
ROE
RGU
RGE
RUE
Personally I think ROG will be the most likely candidate, if we go by current conventions. Of course Ninja will still be NIN as well, I'd think. :3