1-volume encyclopedia describes the historical development of the collections, functions, and services of the world's largest research institution from its origin in 1800 to 2004. This expertly prepared history of the Library of Congress provides users with official, current information about Library of Congress collections, services, and administrative units. The Encyclopedia provides researchers of all levels with insights into the historical development of the Library's collections, buildings, major functions, and principal administrative units, along with an overview of the contributions of key staff members.