You (hopefully) already know the king of web retail is mining data based on your shopping habits, location, music taste, and other fairly obvious lifestyle indicators.

FORBES: Amazon Is Guessing Your Religion From Your Gift Wrap

The King's Fund said the Department of Health data was not perfect but warned the variations in spending were too big to be ignored.

BBC: NHS 'spending lottery persists'

Automatic Data Processing (49, ADP), the king of the outsourcers.

FORBES: Out-Sourcerers