This Directory contains references to human systems integration (HSI) design and interface tools, techniques, databases, guides and standardization documents. HSI encompasses human factors, human performance, training, manpower and personnel systems analysis and design. Contributors include: U.S. Department of Defense (DoD), Federal Aviation Administration (FAA), National Aeronautical and Space Administration (NASA), other U.S. government agencies, NATO countries, academia, and private industry.

The DDSM is a dynamic collection of references and is updated on a regular basis.