I was watching a Youtube video with deleted scenes from the Season 2 episode The Child. Chief O’Brien wasn’t able to beam aboard something because it was hazardous. He didn’t have the authority to override the hazard protocols, so Data did it for him. In order to override the protocols, Data gave his authorization, starting by saying “Computer, recognize Lieutenant Commander NFNNMI Data.” (He said the letters, he didn't try to pronounce them as a word). What in the world is NFNNMI?? Is that Data’s first name? Is it the initials of his first name? Lol!! I never heard NFNNMI in any other episodes. P.S. - To see this scene, start watching at 6:07.