Harmonica reed plates and data centre: what they have in common

1. Step 1. Harmonica reed plates — is part of — Harmonica. Plates with slots for the reeds.
2. Step 2. Harmonica — works like — Accordion. Free-reed instruments; air comes from the lungs instead of bellows.
3. Step 3. Accordion — has part — Keyboard. A keyboard.
4. Step 4. Keyboard — is part of — Computer. The keyboard is the main input device.
5. Step 5. Computer — includes — Server. A computer.
6. Step 6. Server — is part of — Data centre. Thousands of servers.

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