2 oct 1968 año - First computer ball mouse offered by Telefunken.
The device named Rollkugel RKS 100-86 is based
on "reversing" an earlier trackball-like device
(also named Rollkugel) embedded into radar
flight control desks, which had been developed
around 1965 by a team led by Rainer Mallebrein
at Telefunken Konstanz for the
German Bundesanstalt für Flugsicherung (de)
as part of their TR 86 process computer system
with its SIG 100-86 vector graphics terminal.
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