Bionic hand and steam turbine: what they have in common

1. Step 1. Bionic hand — has part — Servomotor. Finger motors.
2. Step 2. Servomotor — is part of — Cruise control. A servo moves the throttle.
3. Step 3. Cruise control — evolved from — Centrifugal governor. Early systems were a development of the centrifugal governor.
4. Step 4. Centrifugal governor — is part of — Watt steam engine. Watt used a centrifugal governor to keep the speed steady.
5. Step 5. Watt steam engine — evolved into — Steam turbine. The turbine replaced piston engines in large installations.

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