Speedometer and laser: what they have in common

1. Step 1. Speedometer — is part of — Cruise control. It compares with the speed reading.
2. Step 2. Cruise control — is used in — Self-driving car. Adaptive cruise control is a step towards autonomy.
3. Step 3. Self-driving car — has part — Lidar. Lidar builds a 3D map of the surroundings.
4. Step 4. Lidar — has part — Laser diode. Laser pulses.
5. Step 5. Laser diode — is a kind of — Laser. A semiconductor laser.

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