Army Knowledge Online (AKO) provides web-based enterprise information services to the United States Army, joint, and Department of Defense customers. Enterprise services are provided to these customers on both classified and unclassified networks, and include portal, e-mail, directory, discovery, and single sign-on functionality. All members of the Active Duty, National Guard, Reserves, Army civilian, and select contractor workforce have an account which grants access to Army web assets, tools and services worldwide. All users can build pages, create file storage areas, and create and participate in discussion on the portal. AKO provides the Army with a single entry point for access to the Internet and the sharing of knowledge and information, making AKO the Army's only enterprise collaboration tool operating throughout the Department of the Army (DA) worldwide. AKO has been deemed "the world's largest intranet." One of every two deployed Soldiers accesses the portal daily for mission and personal purposes, and in 2008 AKO recorded its one-billionth login. AKO has also been expanded to the broader DoD community through Defense Knowledge Online, essentially just a rebranding.