Its stated mission is to deliver effective and responsive knowledge services, thereby connecting people with information, technology, and resources.

Its stated purpose (vision) is essential knowledge services for national security sciences.

[note 1][2][3] The library houses some 150,000 volumes and 1.5 million unclassified reports on a wide variety of technical subjects pertaining to science, mathematics, and engineering.

[1][4] The National Security Research Center (NSRC) contains additional documents, resources, and services specifically related to the Manhattan Project.

[note 2] [6] This article incorporates public domain material from websites or documents of the United States Department of Energy.