Permanent magnet and internet: what they have in common

1. Step 1. Permanent magnet — is part of — Electricity meter. A braking magnet.
2. Step 2. Electricity meter — evolved into — Smart meter. A digital meter.
3. Step 3. Smart meter — has part — Radio module and antenna. Data transmission.
4. Step 4. Radio module and antenna — is part of — Router. A Wi-Fi access point.
5. Step 5. Router — is part of — Internet. A network of routers.

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