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First known calculator
By: Wilhem shickard -
First mass produced calculator
By: Thomas de Colmar -
First tipewriter
Patteted by: William Auston Burt -
First adding machine with a printer
By: Burroughs -
Magnetic recording is invented
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The vacume toob is invented
By: William de Frost -
The electric typewriter is invented
By: IBM -
The Z1 Calculating machine is invented
By: Konrad Zuse -
The Z4 is finished
By: Konread Zuse -
Junction translator
By: William Shockley