Electronic ink and glasses: what they have in common

1. Step 1. Electronic ink — is part of — E-reader. An electronic ink screen.
2. Step 2. E-reader — has part — Flash memory. Memory.
3. Step 3. Flash memory — is part of — Digital camera. A memory card.
4. Step 4. Digital camera — evolved into — Smartphone camera. A miniature digital camera.
5. Step 5. Smartphone camera — is part of — AR glasses. Cameras.
6. Step 6. AR glasses — evolved from — Glasses. Glasses with a display.

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