The Museum of Lost Interactions

Here is a list of exhibits on display at The Museum of Lost Interactions (at the University of Dundee): "Nine exhibits ranging from 1900 to 1979, comprising audio recording machines, wireless morse communicators, portable video to the precurser behind iTunes." For more info visit the webpage here

the richophone (1900)
the prat sampler (1918)
the acoustograph (1920)
the social communicator (1932)
the case communicator (1936)
the chordmaster (1950)
the zenith radio hat (1952)
pester (1970)
the video case (1979)