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by nateabele 4200 days ago
A lot of files that end up on our machines come from the internet, and, at least on OSX (in most browsers), downloaded files are tagged with origin URLs [0].

It's a small step from there to a companion tool that crawls your filesystem for URLs, and attempts to classify them based on a keyword analysis of the origin.

[0] https://code.google.com/p/understand/wiki/MacOSMetadata