This historic publication is a listing of housing systems proposals submitted to the Operation Breakthrough demonstration. Operation Breakthrough was a HUD demonstration project, launched in 1969, to test innovative building methods and materials for the industrial production of housing at volume. Each proposal is given as a written description, followed by a standardized summary to include details of the site, building system and subsystems, economics, production, management, and an additional category for codes and major innovative concepts.

This report is part of the collection of scanned historical documents available to the public.