In 1816, Congress authorized the publication of a list of all federal employees every two years. It appeared in book form under the title Register of Officers and Agents, Civil, Military, and Naval, in the Service of the United States. The Oregon State Library, Salem, Oregon, has in its collection 77 volumes of registers for years ranging from 1863 to 1959 (noninclusive). These Registers are organized by department and thereunder by agency, bureau, or office.