Watch the hype....
Some info about 3D
you need to use Makerware here (Win7, Mac, or Linux) or other software to "slice" STL files.
Slicing is the way to control quality, print time, and amount of material used.
Choice of appropriate slicing parameters is the difference between a successful print
and a pile of spaghetti. The slicer is what turns an STL file into G-code — that tell the printer where to
move the print head and when to extrude plastic.
The output is a s3G file that you will put on a SD card and insert into the machine.