On 7 September, the Library of Congress, which is the world’s largest library, received 1,588 volumes of ATPCO's bound fare, rule, and tariff books. ATPCO's gift to the Library is an almost complete record of how flights were sold, ticketed, and distributed from 1944 to 2004. Although ATPCO has been the world’s source of airline pricing and retailing data for nearly 60 years, this is the first time the public will have access to tariff books.