Human performance technology (HPT) is a professional field of study and application, the main purpose of which is to engineer systems that allow people and organizations to perform in ways that they and all stakeholders value. HPT is a derivative field that for over a half of a century has evolved from a number of disciplines, such as psychology, communications, neuroscience, management science, information science, economics, ergonomics, and measurement and evaluation. It is also the progeny of a number of applied
fields, such as instructional technology, human resource development, organizational  development, and industrial engineering.