is there any downloadable GL API reference?

[supercoollee]

browsing internet is not convenient for me sometimes, so i prefer downloadable references in PDF or CHM format. is there any?

[Yomboprime]

There are the specs at
http://www.opengl.org/registry/
But they're a tough reading

[pjmlp]

You also have the reference cards available at:

http://www.khronos.org/developers/specs/