Programable Shaders

hello every body

what is Progamable Shaders??

I see that in the article about The Future of Opengl in this link:

And if will not a trouble… I would like a simple answer but very complete, cauz my english is not so good…

thanks anyone.


May be this article is useful to you.

[Introduction to Shading Language]


in a section advanced, they answer me too
if you want to look just to curiosity, I like the answer

I will read this article.