Additive manufacturing (AM), the process o f joining materials to make objects from three-dimensional (3D) model data, usually layer by layer, is distinctly a different form and has many advan tages over traditional manufacturing processes. Commonly known as "3D printing," AM provides a cost-effective and time-efficient way to produce low-volume, customized products with compli cated geometries and advanced material properties and function ality. As a result o f the 2013 National Science Foundation (NSF) Workshop on Frontiers of Additive Manufacturing Research and Education, this paper summarizes AM's current state, future potential, gaps and needs, as well as recommendations for technology and research, university-industry collaboration and technology transfer, and education and training.