diff 8.0 and 8i doc

Hi
I am looknig for doc which just talk about the diff. between 8 and 8i (including new features), 8i and 9i so on..
Please let me know where can I find this doc.

Thanks.

Usually I save interesting docs in my local drive while surfing the net. I don't remeber where from I had it. But I do have it. If you want send me an e-mail at orcl_dba@hotmail.com I will attach it in reply.