Heat pipe and heron’s aeolipile: what they have in common

1. Step 1. Heat pipe — is part of — Laptop. Heat pipes.
2. Step 2. Laptop — has part — Keyboard. The keyboard is built into the laptop's case.
3. Step 3. Keyboard — is part of — ATM. A PIN pad.
4. Step 4. ATM — is a kind of — Vending machine. A dispensing machine.
5. Step 5. 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.

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