Programming language and gas lamp: 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 — has part — Computer mouse. A mouse.
4. Step 4. Computer mouse — has part — LED. An optical mouse.
5. Step 5. LED — is part of — Street light. LEDs.
6. Step 6. Street light — evolved from — Gas lamp. Gas lamps.

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