iOS and car: what they have in common

1. Step 1. iOS — is used in — Smartphone. iPhone.
2. Step 2. Smartphone — has part — Hall sensor. A magnetometer compass.
3. Step 3. Hall sensor — is part of — Anti-lock braking system (ABS). Sensors measure the wheel speed.
4. Step 4. Anti-lock braking system (ABS) — is part of — Car. Modern cars.

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