The Historic American Buildings Survey (HABS) and the Historic American Engineering Record (HAER) [...] document achievements in architecture, engineering, and design in the United States and its territories through a comprehensive range of building types and engineering technologies [...]. As of March 1998, America's built environment has been recorded through surveys containing more than 363,000 measured drawings, large-format photographs, and written histories for more than 35,000 historic structures and sites dating from the seventeenth to the twentieth century. This first release adds digital images to the searchable on-line catalog records, including images of the pages of written histories for all HAER surveys and about 25% of HABS surveys, 17% of the HAER survey photographs and a small sampling of the HABS and HAER measured drawings. Additional digital images will be added monthly.