Gram staining and GPS (satellite navigation): what they have in common

1. Step 1. Gram staining — uses — Microscope. For microscopy.
2. Step 2. Microscope — evolved from — Glasses. Spectacle makers assembled the first microscopes.
3. Step 3. Glasses — evolved into — AR glasses. Glasses with a display.
4. Step 4. AR glasses — has part — Smartphone camera. Cameras.
5. Step 5. Smartphone camera — is part of — Self-driving car. Cameras.
6. Step 6. Self-driving car — has part — GPS (satellite navigation). Satellite navigation.

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