Breadboard and modem: what they have in common

1. Step 1. Breadboard — uses — Electrical conduction. Contact strips.
2. Step 2. Electrical conduction — is used in — Antenna. Current in a conductor radiates a wave.
3. Step 3. Antenna — is part of — Doppler radar. An antenna.
4. Step 4. Doppler radar — has part — Digital signal processor. It picks out the Doppler shift.
5. Step 5. Digital signal processor — is part of — Modem. Signal processing in high-speed modems.

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