BASIC and newcomen engine: what they have in common

1. Step 1. BASIC — is used in — Personal computer. The first PCs came with BASIC.
2. Step 2. Personal computer — has part — Monitor. A monitor.
3. Step 3. Monitor — has part — Cathode-ray tube. The first monitors were CRTs.
4. Step 4. Cathode-ray tube — uses — Vacuum. Inside is a vacuum.
5. Step 5. Vacuum — is used in — Newcomen engine. Condensing the steam creates a vacuum under the piston.

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