Pallet and electronic calculator: what they have in common

1. Step 1. Pallet — is used in — Forklift. It works with pallets.
2. Step 2. Forklift — evolved into — Warehouse robot. Automating warehouses.
3. Step 3. Warehouse robot — has part — Lithium-ion battery. A battery.
4. Step 4. Lithium-ion battery — has part — Electrolyte. The electrolyte conducts ions but not electrons.
5. Step 5. Electrolyte — is material for — Alkaline battery. The electrolyte is potassium hydroxide.
6. Step 6. Alkaline battery — is part of — Electronic calculator. A calculator runs on a battery, sometimes on a tiny solar panel.

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