Plugboard with cables and industrial robot: what they have in common

1. Step 1. Plugboard with cables — is part of — Cipher machine. An extra swapping of letters.
2. Step 2. Cipher machine — has part — Keyboard. A keyboard.
3. Step 3. Keyboard — is part of — Carillon. A keyboard.
4. Step 4. Carillon — has part — Pinned cylinder. Automatic carillons have a pinned drum.
5. Step 5. Pinned cylinder — uses — Program control of a machine. The cylinder is a replaceable carrier of a sequence of actions.
6. Step 6. Program control of a machine — is used in — Industrial robot. The movements are recorded in a program.

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