Invation in the United States has been one of the driving forces in our development as one of the leading ecomies in the world. Small companies comprise the overwhelming majority of all businesses in the United States and they must be able to effectively and efficiently bring their invative products and services to market and grow. In this book, the U.S. Small Business Administration's Office of Advocacy focuses on additive manufacturing (also referred to as 3D printing) to determine if barriers, best practices, and big ideas found in that industry are instructive for techlogy industries generally. Moreover, small firms play an increasingly important role in U.S. manufacturing, and w account for almost half of America's manufacturing employment. Dense networks of these small manufacturers are vital to the process of taking a product from concept to market, and the exchange of manufacturing kw-how across suppliers is essential for the diffusion of the new products and invative processes that give U.S. manufacturing its cutting edge. However, these small firms face barriers to invation, a key element in strengthening U.S. competitiveness. The book describes these barriers, and offers suggestions about ways to increase invation by small manufacturers and improve the flow of invation and information within supply chains. Furthermore, the accelerator phemen has been cited nationally and internationally as a key contributor to the rate of business startup success. Accelerators select and invite a small group of entrepreneurs to startup boot camps, providing mentoring, resources, and, most important, industry connections during these programs. This book aims to help entrepreneurs and policymakers by categorising a variety of startup assistance programs to determine what factors distinguish accelerators from other programs, as well as create a starting point for developing meaningful metrics to determine the relevance of accelerators for policymakers.