Find a missing number
Find a missing numberCorrect answers: 227
The first user who solved this task is Eric Newton.
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Tape recorderIn 1948, Wire Recording Corporation of America announced the first magnetic wire recorder. It is lightweight and portable. The 'Wireway' machine with a built-in oscillator sold for $149.50.[Image: Wireway portable combination magnetic wire recorder and phonograph - ca. 1950] |