This is proof that Alice is a magical girl since any culture that refers to ATM by its full name is probably insane and drink potions with frog legs in them.
Tbh, over here the name is shorter.
Like... There is this part of the bank we refer to as the "Caixa", which is where you talk to people to like... Well, make transactions, get money and whatnot.
Then there are the machines that allow you to do all that without talking to someone, which we refer to as "Caixa Eletrônico" (eletronico = electric).
So, ATM to us isn't a weird acronym that nobody knows, but instead a fairly intuitive way of refer to the place you get money from... And we only use 2 words instead of 3.
So yeah, that's how it works over here~