Programming language and lead–acid battery: what they have in common

1. Step 1. Programming language — includes — BASIC. A language.
2. Step 2. BASIC — is used in — Personal computer. The first PCs came with BASIC.
3. Step 3. Personal computer — evolved into — Laptop. A portable PC.
4. Step 4. Laptop — has part — Lithium-ion battery. A battery.
5. Step 5. Lithium-ion battery — evolved from — Lead–acid battery. The lithium-ion battery is the next generation of rechargeable chemical current sources, with higher specific energy.

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