Multivision
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- For the Mexican television network formerly named MVS Multivisión, see MASTV.
Multivision was one of the early, if not the first, commercial attempt at Picture-in-picture television, pioneered by engineer George Schnurle III. Consumers could buy the Multivision unit, which sported a futuristic, "flying mushroom" motif, and place it between their existing television and antenna connection. The unit would output a signal with the secondary channel overlaid on the primary. The user would then use the tuners in the Multivision box to channel surf. The location of the secondary channel on the main screen could be changed, too.