Mainframe and car: what they have in common

1. Step 1. Mainframe — evolved from — Hollerith tabulator. IBM grew out of Hollerith’s company.
2. Step 2. Hollerith tabulator — has part — Relay. Relays controlled the sorting box.
3. Step 3. Relay — is used in — Turn signal. A flasher relay.
4. Step 4. Turn signal — is part of — Car. Turn signals.

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