Electronic System for Travel Authorization (ESTA)

"To provide notice and transparency to the public, the Department of Homeland Security, U.S. Customs and Border Protection announces a new Privacy Act system of records, the Electronic System for Travel Authorization, to collect and maintain a record of nonimmigrant aliens who want to travel to the United States under the Visa Waiver Program (VWP)." Federal Register / Vol. 73, No. 112 / Tuesday, June 10, 2008.