Carillon and turbojet engine: what they have in common

1. Step 1. Carillon — has part — Keyboard. A keyboard.
2. Step 2. Keyboard — is part of — ATM. A PIN pad.
3. Step 3. ATM — is a kind of — Vending machine. A dispensing machine.
4. Step 4. 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.
5. Step 5. Heron’s aeolipile — evolved into — Turbine. The aeolipile is the oldest ancestor of the steam turbine.
6. Step 6. Turbine — is part of — Turbojet engine. The turbine drives the compressor.

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