Hacker News
- The Mathematics of Gamification http://engineering.foursquare.com/2014/01/03/the-mathematics-of-gamification/ 3 comments
Linking pages
- Why the world needs OpenStreetMap | Mapping technologies | The Guardian https://www.theguardian.com/technology/2014/jan/14/why-the-world-needs-openstreetmap 925 comments
- Why the world needs OpenStreetMap — Emacsen's Blog http://blog.emacsen.net/blog/2014/01/04/why-the-world-needs-openstreetmap/ 469 comments
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