3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model. The term "3D printing" can refer to a variety of processes in which material is deposited, joined or solidified under computer control to create a three-dimensional object, with material being added together, typically layer by layer.
Learn more on Wikipediae-NABLE is an online global community of “Digital Humanitarian” volunteers from all over the world who are using their 3D printers to make free and low-cost prosthetic upper limb devices for children and adults in need.
How 3D printing can change lives