1 Stone countertops, including granite, other natural stone and quartz resin (engineered stone) cost $4-$150 per square foot, or $120-$4,500 for a typical 30 square foot kitchen countertop. 2  Stone tiles cost $4-$20 per square foot; slab stone countertops cost $50-$150 per square foot.
STL (STereoLithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL has several after-the-fact backronyms such as Standard Triangle Language and Standard Tessellation Language.
Dynamic Link Library (DLL) files are an essential part of the Windows operating system. Although they are ubiquitous, most PC users neither know nor care what these files do. Nonetheless, a little understanding of the role that DLL files play can make the computer a little less of a mystery box.