Hi all, can someone tell me what is this at-at as my friends today were talking about it but I was not really getting what is at-at as it sounds like a machine gun sound at times. Is it some business purpose related word or some other but what so ever it is guys I really want to know about it. Can someone help me and let me know what is it actually and where is this code sort of a word used what is its purpose. Kindly help me with your information on it.