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Tiny QR code achieved using electron microscope technology (news.ycombinator.com)

2026-02-21 | by Tu Wien | get Microscope Technology → | tags: electron microscope, tu wien, qr code

If you are harassed by lasers (news.ycombinator.com)

2025-10-31 | get computer monitor → | tags: beams, camcorder, holes

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