Informed by the core insight that, in technology and engineering, factual knowledge relating, for example, to the properties of materials or the load-bearing characteristics of differing construction designs is not enough, this analysis follows the often unseen foundations upon which technologies rest—the norms that guide the creative forces shaping the technical landscape to come. The book, a comprehensive survey of these emerging topics in the philosophy of technology, clarifies the role these norms (epistemological, functional, and risk-assessing) play in technological innovation, and the consequences they have for our understanding of technological knowledge.