Steam turbine and hollerith tabulator: what they have in common

1. Step 1. Steam turbine — is part of — Nuclear power plant. Steam turns the turbines — as at a thermal station.
2. Step 2. Nuclear power plant — has part — Transformer. Transformers step up the voltage so the plant's power can travel far.
3. Step 3. Transformer — has part — Copper wire. Windings.
4. Step 4. Copper wire — is part of — Magnetic-core memory. Wires threaded through them.
5. Step 5. Magnetic-core memory — is part of — Mainframe. Magnetic-core memory.
6. Step 6. Mainframe — evolved from — Hollerith tabulator. IBM grew out of Hollerith’s company.

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