OpenGL (Open Graphics Library) is an API specification for 3D computer graphics. It is independent of any platform or programming language, and allows 3D scenes to be rendered in real time.

A graphics card driver routes 3D commands to either the graphics card or the CPU of a computer. There, OpenGL technology allows the processing of voluminous 3D scenes or displays in real time, as it is used when working with IsoDraw CADprocess.

OpenGL was invented in the early 90s by a group of companies called the OpenGL Architecture Review Board.

http://www.opengl.org/documentation/opengl_current_version.html