What's a BRT ? Two U.S. army officers once passed a new recruit who was on cleaning duty... ""Don't forget to clean off the B.R.T."" said one of them, pointing to a big round metal object. ""Boy, how do you know all the names of all the different machinery?"" marveled a fellow officer. ""And what does B.R.T. stand for, anyway ?"" ""Big Round Thing,"" he answered.