How do you pronounce ROC? In regards to ROC curves, how do you pronounce ROC? I have always spelled out the letters like R-O-C but I sat through a sales demo today where they guy pronounced it as a word like "rock" as in "the rock curve". 

So who's right?
I have personally only heard the letters being spelled out:


  "Here we see the R-O-C curve on this pronunciation model is far from optimal"