Stagecoach and data centre: what they have in common

1. Step 1. Stagecoach — has part — Leaf spring. Leaf springs.
2. Step 2. Leaf spring — evolved into — Suspension. Car suspension inherited carriage leaf springs.
3. Step 3. Suspension — is part of — Electric car. The suspension is the same as in an ordinary car.
4. Step 4. Electric car — has part — Inverter. An inverter powers the traction motor.
5. Step 5. Inverter — is part of — Uninterruptible power supply. An inverter.
6. Step 6. Uninterruptible power supply — is part of — Data centre. Backup power.

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