Foam core and electronic calculator: what they have in common

1. Step 1. Foam core — is part of — Surfboard. A light buoyant core.
2. Step 2. Surfboard — is made of — Fibreglass. Fibreglass.
3. Step 3. Fibreglass — is material for — Motherboard. The board is fibreglass laminate.
4. Step 4. Motherboard — is part of — Laptop. All the laptop's chips sit on the motherboard.
5. Step 5. Laptop — has part — Liquid-crystal display. An LCD screen.
6. Step 6. Liquid-crystal display — is part of — Electronic calculator. An LCD display.

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