Plugboard with cables and gyroscope: what they have in common

1. Step 1. Plugboard with cables — is part of — Cipher machine. An extra swapping of letters.
2. Step 2. Cipher machine — has part — Keyboard. A keyboard.
3. Step 3. Keyboard — is part of — Laptop. The keyboard is built into the laptop's case.
4. Step 4. Laptop — has part — Display. A laptop's lid is its screen.
5. Step 5. Display — is part of — VR headset. A VR headset has two displays, one per eye.
6. Step 6. VR headset — has part — Gyroscope. Head tracking.

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