Gregory Moore, Professor of Physics at Rutgers, has an article in the February issue (in "Communications" section) of the Notices of the AMS, where he writes the following in the opening: "The term 'brane' has come to mean many things to many people." Writing about this article, Peter Woit, Professor of Mathematics at Columbia, says in his blog ". . .and one of the difficulties of the subject is that one has to figure out from context what sort of brane someone is talking about."
I have to learn more about what these gentlemen are talking about. . .