I was in Montreal a couple of weeks back and they used RDC for Rez de Chaussee!

Well, there are a lot of things in Quebec that are different than in the rest of Canada. [massive understatement] That is why it is good (in general) that belMarduk is aBoard, she can correct me if I over-generalize, my experience being limited to the west and far-east of Canada. In this case it's dxb I should thank for pointing that out.