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Notes
The original form of keycard, fingerprint, RFID card, or security token
Definition
A device that is used to operate a lock, such as to lock or unlock it.
Invention
6th century B.C. by Theodorus of Samos
Obsolescence
2030 A.D. - 2035 A.D.
Components
The bit or blade, which slides into the keyway of the lock and distinguishes between different keys, and the bow, which is left protruding so that torque can be applied by the user.
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