Where does mother abbess hide the family in sound of music?

Mother Abbess hides the family in the abbey.
The family von Trapps are hiding from the Nazis, and Mother Abbess helps them escape from their tormentors. She even gathers the other nuns to help them by breaking the Nazi's cars and thus stopping them from chasing after the family.

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.