National Security Branch Analysis Center

Overview
The National Security Branch Analysis Center (NSAC) is an FBI database with over 1.5 billion government and private-sector records, which are mined for use in criminal investigations. The records include:


 * International travel records of citizens and foreigners
 * Financial forms filed with the Treasury by banks and casinos
 * 55,000 entries on customers of Wyndham Worldwide, which includes Ramada Inn, Days Inn, Super 8, Howard Johnson and Hawthorn Suites
 * 730 records from rental-car company Avis
 * 165 credit card transaction histories from Sears
 * Nearly 200 million records transferred from private data brokers such Accurint, Acxiom and Choicepoint
 * 17,000 traveler itineraries from the Airlines Reporting Corporation.

Source

 * Ryan Singel, "Newly Declassified Files Detail Massive FBI Data-Mining Project," WIRED Mag. (Sept. 23, 2009) (full-text).