Vending machine and car: what they have in common

1. Step 1. Vending machine — was inspired by — Heron’s aeolipile. Heron described both a holy-water dispenser and the aeolipile; the dispenser is the prototype of the vending machine.
2. Step 2. Heron’s aeolipile — evolved into — Turbine. The aeolipile is the oldest ancestor of the steam turbine.
3. Step 3. Turbine — is part of — Torque converter. The turbine wheel.
4. Step 4. Torque converter — is part of — Automatic transmission. A torque converter.
5. Step 5. Automatic transmission — is part of — Car. An automatic gearbox changes gear by itself.

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