Do you really want to send xiong a message saying you like their work?
Often abbreviated NMI.
This is not something the everyday end user ever sees directly, although whenever your computer crashes, it very likely either invoked an NMI -- or failed to do so properly.
see: interrupt handling
{computer worker slang} Something I've got to do right away, no matter what. Example: "Sorry, I gotta go pee *now* -- NMI!"