This is the history from Rosita from Ecuador.
One day she came home and her roommate, a german medicin student, told her that one inspector from the "GEZ" was there looking for her.
The GEZ is the public institution, to whom every reported citizen in Berlin has to pay for the use of radio and computer or television... Rosita, as every foreign student, is of course reported in Berlin. The german roomate not. That´s why she has to pay for both computer and for the old radio in the kitchen.