Ultrasound scanner and typewriter: what they have in common

1. Step 1. Ultrasound scanner — has part — Monitor. A screen.
2. Step 2. Monitor — is part of — Personal computer. A monitor.
3. Step 3. Personal computer — has part — Keyboard. A keyboard.
4. Step 4. Keyboard — is part of — Typewriter. The keys drive levers with type.

Open Evothings