HTTP and heron’s aeolipile: what they have in common

1. Step 1. HTTP — is used in — TLS/HTTPS. Secure HTTP.
2. Step 2. TLS/HTTPS — is used in — Online payments. Secure transmission.
3. Step 3. Online payments — uses — Payment card. Cards.
4. Step 4. Payment card — is used in — ATM. It dispenses money for a card.
5. Step 5. ATM — is a kind of — Vending machine. A dispensing machine.
6. Step 6. 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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