Oscilloscope and typewriter: what they have in common

1. Step 1. Oscilloscope — has part — Cathode-ray tube. The first ones used CRTs.
2. Step 2. Cathode-ray tube — is part of — Monitor. The first monitors were CRTs.
3. Step 3. Monitor — is part of — Personal computer. A monitor.
4. Step 4. Personal computer — has part — Keyboard. A keyboard.
5. Step 5. Keyboard — is part of — Typewriter. The keys drive levers with type.

Open Evothings