Computer graphics and bellows: what they have in common

1. Step 1. Computer graphics — uses — Graphics processing unit. Acceleration.
2. Step 2. Graphics processing unit — is part of — Graphics card. GPU.
3. Step 3. Graphics card — is part of — Personal computer. A graphics card.
4. Step 4. Personal computer — has part — Keyboard. A keyboard.
5. Step 5. Keyboard — is part of — Pipe organ. Manuals were the first keyboards.
6. Step 6. Pipe organ — has part — Bellows. Bellows supply the air.

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