Wonders of Tomorrow Frequency is a loop of music that plays automatically on the New York 2077 World Fair or whatever remains of it. Originally designed to test the Pipboy radio model on display in the RobCo pavilion; it consists mainly of muzak and simple optimistic tunes to symbolize the greater days to come. Evidently, It didn't quite play out the way they expected. Nevertheless, WoT FM is still accessible today for those who like to listen to the chirpy tunes.
Here's a link to a playlist of all the songs in no particular order: Youtube Playlist
Disney's Sherman Brothers