The last time I taught Grad Ramsey Theory there were very good math grads and ugrads in it. They used some acronyms - some I knew, some I didn't know (but know now).  I am sure some are well known and some are now. I don't know which is which. Here is the list and comments WLOG- Without Loss of Generality. This one I know and it seems well know-- When Googled the first page is all this defini