Congratulations, you have found an easter egg: `nm' is a great tool. NM is great champagne. While nm stands for name list, NM acronym is for Négociant Manipulateur. While this might sound somewhat irritating like "genetically modified" to the neophyte ear, the Œnologue will immediately recognize that he's front of a great champagne.
For more information on the Négociant Manipulateur, see Wikipedia page about Champagne (wine).