Electron and CNC machine: what they have in common

1. Step 1. Electron — evolved from — Cathode-ray tube. Thomson discovered the electron in cathode rays.
2. Step 2. Cathode-ray tube — is used in — Sketchpad. A CRT screen.
3. Step 3. Sketchpad — evolved into — CAD. Sketchpad was the first CAD system.
4. Step 4. CAD — is used in — CNC machine. Programs from CAD/CAM.

Open Evothings