ATM and oil lamp: what they have in common

1. Step 1. ATM — is a kind of — Vending machine. A dispensing machine.
2. Step 2. 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.
3. Step 3. Heron’s aeolipile — uses — Combustion. A fire boils the water in the cauldron.
4. Step 4. Combustion — is used in — Oil lamp. Burning oil gives the light.

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