Although in this site the names of US states are generally spelled out in full in location names, there is a link to information about the individual states as identified by the two character abbreviations defined by the United States Postal Service (USPS).
There is a set of links to commercial web-sites which provide access to genealogical information for the United States of America. These are sites that charge for access to the information.
There is a set of links to web-sites which provide access to genealogical information that is available free of charge.