QR code and internet: what they have in common

1. Step 1. QR code — uses — Smartphone camera. It is read by a phone camera.
2. Step 2. Smartphone camera — is part of — Endoscope. Video endoscopes.
3. Step 3. Endoscope — has part — Optical fibre. Flexible endoscopes use optical fibre.
4. Step 4. Optical fibre — is part of — Internet. The backbones are optical fibre.

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