Puget Technologies Inc (PUGE)

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History of 3-D Printing - How stuff works
The earliest use of additive manufacturing was in rapid prototyping (RP) during the late 1980s and early 1990s. Prototypes allow manufacturers a chance to examine an object's design more closely and even test it before producing a finished product.
RP allowed manufacturers to produce those prototypes much faster than before, often within days or sometimes hours of conceiving the design.
In RP, designers create models using computer-aided design (CAD) software, and then machines follow that software model to determine how to construct the object. The process of building that object by "printing" its cross-sections layer by layer became known as 3-D printing.

The earliest development of 3-D printing technologies happened at Massachusetts Institute of Technology (MIT) and at a company called 3D Systems. In the early 1990s, MIT developed a procedure it trademarked with the name 3-D Printing, which it officially abbreviated as 3DP. Today, some of the same 3-D printing technology that contributed to RP is now being used to create finished products. The technology continues to improve in various ways, from the fineness of detail a machine can print to the amount of time required to clean and finish the object when the printing is complete.

The processes are getting faster, the materials and equipment are getting cheaper, and more materials are being used, including metals and ceramics. Printing machines now range from the size of a small car to the size of a microwave oven.