Handheld console and oil lamp: what they have in common

1. Step 1. Handheld console — has part — Display. A handheld console has its screen built in.
2. Step 2. Display — is part of — VR headset. A VR headset has two displays, one per eye.
3. Step 3. VR headset — has part — Lens. Lenses.
4. Step 4. Lens — is part of — Magic lantern. Lenses.
5. Step 5. Magic lantern — uses — Oil lamp. The light source is an oil lamp.

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