What is the OG and how do I get it?

[h_mittal]

WHAT IS OG and Hoe do I get it ? I have been trying to find some CAT practice tests. I went through a lot of posts and saw most of the people recommending OG. I searched through google and found two links for practice tests - 800SCORE and CRACK-GMAT ? Can somebody give me some good directions asto how to go about it ?
Thanks,
Hitesh

[Erin]

The OG is the only legitimate source of actual, previously administered GMAT questions. See the official GMAT site for more info at mba.com. You can also download the official GMAT practice test at this site for free (called the PowerPrep).

You can read what I have to say about it here, and you can buy it from Amazon here or from half.com secondhand here.

I don't really know much about those other tests, but I've looked at the verbal sections a bit. Of course, I didn't think they were up to par for the verbal section, but some people have said they found the math section of the 800score tests helpful. Actually, I think 800score is based in India, so perhaps the math is good.