Wood and data centre: what they have in common

1. Step 1. Wood — is material for — Submarine. Drebbel’s boat (1620) was wooden, covered with leather.
2. Step 2. Submarine — has part — Lead–acid battery. Underwater, electric motors run on batteries.
3. Step 3. Lead–acid battery — is part of — Uninterruptible power supply. A battery.
4. Step 4. Uninterruptible power supply — is part of — Data centre. Backup power.

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