SCADA and shipping container: what they have in common

1. Step 1. SCADA — uses — Programmable logic controller. Polling the controllers.
2. Step 2. Programmable logic controller — has part — Microprocessor. A processor.
3. Step 3. Microprocessor — is part of — Anti-lock braking system (ABS). A control unit.
4. Step 4. Anti-lock braking system (ABS) — evolved from — Air brake. Anti-skid systems first appeared in aviation and on railways.
5. Step 5. Air brake — is part of — Truck. Air brakes, as on trains.
6. Step 6. Truck — uses — Shipping container. A container moves from ship to truck without being unloaded.

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