Tetrad 1:
The Electric Typewriter
Enhanced: The electric typewriter enhanced the distribution of the written word at a quicker easier pace.
Obsolesced: The manual typewriter. Although still used, the electric typewriter was more efficient.
Reversed: The electronic typewriter was setting the stage for the keyboard used in personal computers as an input device.
Retrieved from past: The printing press. Inputting information and outputting data.
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