BRT

BRT stands for "Belgische Radio & Televisie" (Belgian Radio & Television). It's the national television and radio broadcast for the Flemish part of Belgium.
The name changed in 1991 to VRT: "Vlaamse Radio & Televisie" (Flemish Radio & Television)

The Walloon (French speaking) counterpart of BRT is RTBF. They didn't change name since then.

Sometimes mentioned as B.R.T.