The Oregon Museum of Science & Industry (OMSI) is a large, non-profit museum located in the city of Portland Oregon that started has a simple city hall exhibition and now serves over 1 million visitors. There were three primary objectives driving the “Preserving the Institutional History of OMSI” project: to arrange and describe, increase access, and plan for future success. Accomplishing these goals has created the organizational structure of a successfully functioning archive and set the museum on a path to making its archival material available to the external community.