please help me with the meaning of ADIT?

I received a e-mail from USCIS. it is as below.

On December 1, 2007, we mailed you a notice that we had registered this
customer's new permanent resident status. Please follow any
instructions on the notice. Your new permanent resident card should be mailed
within 60 days following this registration or after you complete any ADIT
processing referred to in the welcome notice, whichever is later. If
you move before you get your new card call customer service. You can also
receive automatic e-mail updates as we process your case. Just follow
the link below to register.

It seems that they approved my green card. but i was confused by the word ADIT. If possible, could you please tell me the meanings of ADIT?

THANK YOU VERY MUCH AND GOOD NIGHT!

所有跟帖： 

• I FOUND THE ANSWER. SORRY TO BOTHER YOU -0822- ♀ (0 bytes) () 12/04/2007 postreply 22:36:02

• what is the answer then? Please share... -HardDrive- ♂ (0 bytes) () 12/04/2007 postreply 22:43:26

• search for ADIT in this part -0822- ♀ (0 bytes) () 12/05/2007 postreply 20:19:58