Turing’s Bombe and steam turbine: what they have in common

1. Step 1. Turing’s Bombe — has part — Relay. Electromechanics.
2. Step 2. Relay — is part of — Traffic light. Relay controllers.
3. Step 3. Traffic light — uses — Coal gas. A gas lamp lit the signal.
4. Step 4. Coal gas — is made of — Coal. The gas was made by the dry distillation of coal.
5. Step 5. Coal — is used in — Combined heat and power plant. It burns coal or gas.
6. Step 6. Combined heat and power plant — has part — Steam turbine. Steam turns the turbine.

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