Thermistor and windlass: what they have in common

1. Step 1. Thermistor — is part of — Digital thermometer. A thermistor.
2. Step 2. Digital thermometer — has part — Liquid-crystal display. The reading is on an LCD.
3. Step 3. Liquid-crystal display — is part of — Electronic calculator. An LCD display.
4. Step 4. Electronic calculator — evolved from — Arithmometer. Electronics replaced mechanics.
5. Step 5. Arithmometer — has part — Crank. The handle for adding and subtracting.
6. Step 6. Crank — is used in — Windlass. The handle of a windlass is a crank.

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