Intercontinental ballistic missile and hollerith tabulator: what they have in common

1. Step 1. Intercontinental ballistic missile — has part — Gyroscope. Inertial navigation.
2. Step 2. Gyroscope — is part of — Hoverboard. Gyroscopes keep the balance.
3. Step 3. Hoverboard — has part — Hub motor. Hub motors.
4. Step 4. Hub motor — uses — Electromagnetism. A hub motor is an electric motor.
5. Step 5. Electromagnetism — is used in — Hollerith tabulator. The counters click with electromagnets.

Open Evothings