Though his firm succeeded in part through stunts, Mr. Edelman conceived of public relations as an overarching information function of which advertising was a subset.

WSJ: Public-Relations Pioneer Began With 'Toni Twins' Stunt

Decaux and local government have resulted in a proliferation of bus shelters and other street furniture whose sole function is to display advertising.

ECONOMIST: Letters

The upper screens function as digital signage, bringing in advertising revenues and allowing the Beacon to provide its other functions free.

BBC: New York's phone boxes get new lease of life