Much has been said about Google having some kind of algorithm that predicts when employees will quit. There were 83 articles on this at Google News. But this is really not that big a deal. Google has thousands of employees, it gives them surveys, questionnaires, etc., and feeds that info into a data warehouse. Then, after a bunch of people quit, it takes that data, analyzes and figures out who else fits the pattern of those who quit. A complex problem, but hardly rocket science.
More surprising to me is how GMail comes up with these wacky results, as shown below:

So….chemistry.com equates to gonorrhea and car crash photos. hmm.