Cache memory and greenhouse: what they have in common

1. Step 1. Cache memory — is part of — Microprocessor. Cache.
2. Step 2. Microprocessor — evolved from — Electronic calculator. The Intel 4004 was designed for a Busicom calculator.
3. Step 3. Electronic calculator — has part — Solar panel. Many run on a solar cell.
4. Step 4. Solar panel — has part — Window glass. Tempered cover glass.
5. Step 5. Window glass — is part of — Greenhouse. It lets light in and holds heat.

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