Anvil horn and personal computer: what they have in common

1. Step 1. Anvil horn — is part of — Anvil. A cone for bending.
2. Step 2. Anvil — is used in — Forge. Forging on an anvil.
3. Step 3. Forge — has part — Bellows. Bellows fan the fire of the forge.
4. Step 4. Bellows — is part of — Pipe organ. Bellows supply the air.
5. Step 5. Pipe organ — has part — Keyboard. Manuals were the first keyboards.
6. Step 6. Keyboard — is part of — Personal computer. A keyboard.

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