This is a Stack Overflow user's scores by tags visualization.
Check how it looks like for some most effective users:

• Jon Skeet - most effective user for all time.
• Lars Kotthoff - d3.js tag most effective user.
• Mike Bostock - creator of D3.js.
• Dan Abramov - reactjs and redux tags most effective user.
• T.J. Crowder - javascript tag most effective user.
• Martijn Pieters - python tag most effective user.
• Gordon Linoff - sql tag most effective user.
• Simone Carletti - ruby-on-rails tag most effective user.

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