I apologize for not explaining my question right. I went back and looked on the beginners info pages,, I worded my question wrong. What I should have asked was,, "are the REO's apv's/mods? The largest of the three categories? Sorry for the confusion. I just started vaping less than a week ago and I am ready to throw out these minis so a lot of this stuff is like reading another language to me and is a bit overwhelming.. You guys have been very helpful though and thank you for the links.. Looks like I'll be up late tonight, lol