need help PLEASE!!!

Guys, I am preparing GMAT too, and download some materials from CD. By looking at all you guys posting regarding the experience of test preparation, I am kind of confused by some abbreviations, such as OG10/OG11, XY13. I know these are the name of materials, but where can I find them, have these been included in CD download category already? BTW, I am not in China. BOW// 

http://forum.chasedream.com/dispbbs.asp?BoardID=34&replyID=2377359&id=254742&skin=0

http://forum.chasedream.com/dispbbs.asp?boardID=34&ID=131715&page=1第二楼。