Dear Shreya,

The rank you mention is your general catagory rank or all india rank .. AIR rank is without any special specification of OBC, SC, ST or PD. Its all under genereal category that means no specification.

Click the link below link for opening and closing rank of IIT :

http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx

Cutoff in new IITs  check the link give below :

http://jee.iitd.ac.in/openclose09.htm    (this link includes the more detail analysis)

for code of the cources check the councelling broucher 2009.

Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.

 All the best.