The document provides an overview of 3D printing, including its history and projected growth. It describes the 3D printing process of using CAD software to design an object and then printing it layer by layer. Examples are given of 3D printing being used for concept modeling, functional prototyping, manufacturing tools, end use parts, and finishing. Intriguing applications of 3D printing in fields like medicine, food, entertainment, DIY, defense, and fashion are also summarized.