What is STL Format?
An STL (Standard Triangulation language) file is simply a mesh of triangles wrapped around a CAD model was defined by 3D systems in 1980s. STL, name is derived from rapid prototyping process, Stereo Lithography, also known as abbreviation of Standard Triangulation Language. This very simple format has become an industry standard for the Rapid Prototyping sector. Virtually all-modern CAD systems now include STL or Rapid Prototyping output as a standard feature.