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1.
Show HN: OpenFreeMap – Open-Source Map Hosting (openfreemap.org)
848 points by hyperknot 5 months ago | 234 comments
2.
Digital signatures and how to avoid them (neilmadden.blog)
278 points by _ikke_ 5 months ago | 82 comments
3.
Mathematics all-in-one cheat-sheet (2013) [pdf] (keybase.pub)
1060 points by rodmena on May 30, 2019 | 161 comments

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