To help low-level software (which is more similar to the machine language) understand high-level software (more similar to the human language), we need to use an Application Programming Interface (API).^[1] OpenGL is an API for rendering rasterized 2D and 3D graphics on different platforms. While it is an old API, it is being updated over time (currently, the 4.6 version from 2017 is the latest one).