Automaton and monitor: what they have in common

1. Step 1. Automaton — has part — Spring. The mainspring stores the energy.
2. Step 2. Spring — is part of — Pinball. A plunger.
3. Step 3. Pinball — evolved into — Arcade machine. Coin-operated entertainment.
4. Step 4. Arcade machine — has part — Cathode-ray tube. A CRT monitor.
5. Step 5. Cathode-ray tube — is part of — Monitor. The first monitors were CRTs.

Open Evothings