Chatbot and typewriter: what they have in common

1. Step 1. Chatbot — uses — Algorithm. ELIZA used patterns.
2. Step 2. Algorithm — is used in — Program control of a machine. A program is a written algorithm.
3. Step 3. Program control of a machine — is used in — Pinned cylinder. The cylinder is a replaceable carrier of a sequence of actions.
4. Step 4. Pinned cylinder — is part of — Carillon. Automatic carillons have a pinned drum.
5. Step 5. Carillon — has part — Keyboard. A keyboard.
6. Step 6. Keyboard — is part of — Typewriter. The keys drive levers with type.

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