Blast furnace and payment card: what they have in common

1. Step 1. Blast furnace — has part — Bellows. Air was blown in by bellows, later by blowers.
2. Step 2. Bellows — is part of — Pipe organ. Bellows supply the air.
3. Step 3. Pipe organ — has part — Keyboard. Manuals were the first keyboards.
4. Step 4. Keyboard — is part of — ATM. A PIN pad.
5. Step 5. ATM — uses — Payment card. It dispenses money for a card.

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