To me, I just call them mini-hamburgers. But in today's day and age, they are infamously known as "Sliders". Growing up, the only real mini-burger we heard of was at White Castle and it took a good 45 minutes to get to the closest one from where I lived. Now, they have a whole food category all on their own. In fact, when searching on FoodNetwork.com, there are 78 listed different kinds of them on their site alone...amazing! So I did a little bit of research to find out who REALLY invented the slider and this is what I found out.