Philip Taylor (RHBNC) writes: > (the earlier proposal to use commercial-at is just one way of > hiding such things, neithe better nor worse (in this context) than > any other mechanism). I think it is better - at the moment I can use \def in my document without doing anything special. If I want to use a command \@def I have to go to a little trouble - not much trouble, but at least I know that there might be consequences of my actions! Renaming it \tex/def achieves the same result because / will have its normal catcode while processing a document.