Graphical user interface and truck: what they have in common

1. Step 1. Graphical user interface — uses — Computer mouse. The pointer is controlled with a mouse.
2. Step 2. Computer mouse — is part of — Personal computer. A mouse.
3. Step 3. Personal computer — has part — Microprocessor. The PC became possible thanks to the microprocessor.
4. Step 4. Microprocessor — is part of — Anti-lock braking system (ABS). A control unit.
5. Step 5. Anti-lock braking system (ABS) — evolved from — Air brake. Anti-skid systems first appeared in aviation and on railways.
6. Step 6. Air brake — is part of — Truck. Air brakes, as on trains.

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