The document discusses the history and future of additive manufacturing (AM), also known as 3D printing. It summarizes that AM is a digital fabrication process that creates objects layer by layer from 3D model data. AM allows for customization, rapid prototyping, and production of complex objects. The document outlines several applications of AM including in architecture, engineering, construction, medicine, aerospace, and more. It provides examples of how AM is being used by companies like Airbus and NASA to revolutionize industries and space exploration.