Milling machine and programmable logic controller: what they have in common

1. Step 1. Milling machine — evolved into — CNC machine. The first CNC machines were milling machines (MIT, 1952).
2. Step 2. CNC machine — has part — Servomotor. Servo drives move the axes.
3. Step 3. Servomotor — is part of — Industrial robot. Servo motors drive the joints.
4. Step 4. Industrial robot — is used in — Industrial automation. Robots.
5. Step 5. Industrial automation — uses — Programmable logic controller. Controllers.

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