Machine tool and syringe: what they have in common

1. Step 1. Machine tool — includes — Milling machine. A milling machine.
2. Step 2. Milling machine — evolved into — CNC machine. The first CNC machines were milling machines (MIT, 1952).
3. Step 3. CNC machine — has part — Servomotor. Servo drives move the axes.
4. Step 4. Servomotor — is part of — Insulin pump. A stepper motor moves the plunger.
5. Step 5. Insulin pump — uses — Insulin. It doses insulin.
6. Step 6. Insulin — uses — Syringe. Injections.

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