Computer related, more widely known as an
initialism meaning "Dumb-Ass User", but also less commonly known as the Hacker slang (correct sense of the word, meaning a geek-like person, not a cyber criminal) term DAU stemming from the German "Dümmster Anzunehmender User ", meaning
stupidest imaginable user. (Source: The
Jargon File)
Even a DAU would be able to use this
program!
Gah! My Dad is
literally the DAU when it comes to using a
printer! He has no idea what he is doing.