Face recognition and vacuum pump: what they have in common

1. Step 1. Face recognition — is used in — Security camera. Analytics.
2. Step 2. Security camera — has part — Monitor. A guard watches the camera feed on a monitor.
3. Step 3. Monitor — has part — Cathode-ray tube. The first monitors were CRTs.
4. Step 4. Cathode-ray tube — evolved into — Electron. Thomson discovered the electron in cathode rays.
5. Step 5. Electron — is used in — Electron microscope. A beam of electrons instead of light.
6. Step 6. Electron microscope — has part — Vacuum pump. A vacuum in the column.

Open Evothings