Fuji used to have NPS and NPC instead of Pro 160S and Pro 160C. In Japan, it looks like they use other names that are a combination of the new names and the old names (minus the P, perhaps for "Professional"?): 160NS and 160NC. It seems fairly obvious that these are what we call Pro 160S and Pro 160C, and used to call NPS and NPC, though I don't know for sure. The Kodak NC is, of course, preceded by "Portra", and labeled "Kodak", and comes in a yellow box, so I doubt people get confused that often.
For a while (I am not sure how long), Fuji codes for pro film have been S for the low contrast, low saturation, medium speed film (I guess that S = "skin"), C for the high contrast, high saturation, medium speed film (I guess that C = "contrast"), L for the tungsten-balanced medium speed film (L = type L film), H for the 400 speed film (I guess H = "high speed"), and Z for the 800 speed film (I don't know what Z could be...ZOUNDS!!!???). For instance, Fuji NPZ was an 800-speed pro emulsion, and CZ was an 800-speed consumer emulsion (though it could also be bought with the "pro" treatment as Superia Press). Same with NPH and CH. It seems logical that the C = "consumer", the P = "professional", but I don't know what the N could mean.