Johannes Gutenberg is credited with inventing movable type and the printing press. He also was a blacksmith, and could scarcely have imagined that there would come a day when a descendent of the press on which he printed documents would be able to “print” a horse shoe.
3-D printing has been in development and the early stages of use, and it looks like, for a widespread audience, its time approacheth. So, if you are unfamiliar with the technology, or want to learn more about it, you may wish to read this (no need to print it).