Oxygen concentrator and monitor: what they have in common

1. Step 1. Oxygen concentrator — uses — Oxygen. Oxygen.
2. Step 2. Oxygen — is material for — V-2 rocket. The oxidizer is liquid oxygen.
3. Step 3. V-2 rocket — has part — Gyroscope. A gyroscopic guidance system.
4. Step 4. Gyroscope — is part of — VR headset. Head tracking.
5. Step 5. VR headset — has part — Display. A VR headset has two displays, one per eye.
6. Step 6. Display — is part of — Monitor. The heart of a monitor is the display: an LCD panel, once a picture tube.

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