tp://www.opengl.org/resources/features/OGLextensions/">All About OpenGL Extensions</a></li>
<li><a href="http://www.opengl.org/registry/">OpenGL Extension Registry</a></li>
<li><a href="http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/OpenGLExtensionsGuide/Reference/reference.html">APPLE OpenGL Extensions Guide</a></li>
<li><a href="http://developer.nvidia.com/nvidia-opengl-specs">NVIDIA OpenGL Extension Specifications</a></li>
</ul>

