Supersonic airliner and fitness tracker: what they have in common

1. Step 1. Supersonic airliner — is a kind of — Jet airliner. An airliner.
2. Step 2. Jet airliner — has part — Autopilot. An autopilot.
3. Step 3. Autopilot — uses — Feedback control. Holding a course by feedback.
4. Step 4. Feedback control — is used in — Electric unicycle. Balancing.
5. Step 5. Electric unicycle — has part — Accelerometer. Tilt sensors.
6. Step 6. Accelerometer — is part of — Fitness tracker. A pedometer.

Open Evothings