Virtualization and boyle’s air pump: what they have in common

1. Step 1. Virtualization — uses — Mainframe. IBM mainframes.
2. Step 2. Mainframe — includes — UNIVAC I. UNIVAC I was one of the first big computers, ancestor of mainframes.
3. Step 3. UNIVAC I — has part — Vacuum tube. Vacuum tubes.
4. Step 4. Vacuum tube — uses — Vacuum. Electrons fly in an evacuated bulb.
5. Step 5. Vacuum — is used in — Boyle’s air pump. The pump draws out the air.

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