Paper feed rollers and refrigerator: what they have in common

1. Step 1. Paper feed rollers — is part of — Printer. Rollers pull the sheet through.
2. Step 2. Printer — has part — Microcontroller. A controller processes the print job.
3. Step 3. Microcontroller — is used in — Multicooker. Programs.
4. Step 4. Multicooker — evolved from — Rice cooker. A multicooker.
5. Step 5. Rice cooker — has part — Thermostat. Switching off by temperature.
6. Step 6. Thermostat — is part of — Refrigerator. A thermostat.

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