It says "hot surface do not touch" in full, actually. Braille uses single characters to represent some common letter combinations ("touch" is "t" + "ou" + "ch"). The words "do" and "not" are each contracted to a single letter ("d" and "n" respectively).
Interesting question, I was really talking about the message in the image, but I don't know about the title.
I knew someone who had a braille laptop once, so instead of a screen it had a tactile braille row in front of the keyboard. I assume if you gave it braille characters it could give them to the user, but I actually have no idea.