Oven mouth and electronic calculator: what they have in common

1. Step 1. Oven mouth — is part of — Oven. An opening for loading and draught.
2. Step 2. Oven — is used in — Bread. Bread is baked in an oven.
3. Step 3. Bread — uses — Bread machine. Baking at home.
4. Step 4. Bread machine — uses — Microcontroller. Programs.
5. Step 5. Microcontroller — is a kind of — Integrated circuit. A chip.
6. Step 6. Integrated circuit — is part of — Electronic calculator. A chip.

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