Public records provide information about businesses and individuals, are on file with government entities and are (though sometime difficult to find) accessible to the public.
Examples include:
People Businesses bankruptcies, liens & judgments bankruptcies, liens & judgments real property ownership & transfer real property ownership & transfer aircraft & water registrations corporations & limited partnerships campaign contributions & voter registrations environmental site records criminal records fictitious business names ("DBAs") drivers' licenses & motor vehicle registrations UCC liens professional licenses Terrorist Watchlist