BASIC and telescope: what they have in common

1. Step 1. BASIC — is used in — Personal computer. The first PCs came with BASIC.
2. Step 2. Personal computer — has part — Monitor. A monitor.
3. Step 3. Monitor — has part — Display. The heart of a monitor is the display: an LCD panel, once a picture tube.
4. Step 4. Display — is part of — VR headset. A VR headset has two displays, one per eye.
5. Step 5. VR headset — has part — Lens. Lenses.
6. Step 6. Lens — is part of — Telescope. An objective and an eyepiece.

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