Just a Thought

I'm posting extra late once again but before I go back in and write some more I want to bring up a question I was thinking of that no one ever answered.

OK why do drive thru ATM's have braille on the little pad? I'm pretty sure I dont have to go any further to explaining why that shouldnt be but if anyone has an answer let me know please..Yes these are the things I think of throughout my day haha.

Well back to the pen and pad.