L.s.d.
 

did toyota supras come stock with limited slip?

Yes, but only the turbo '93.5-'96s, and the '97 & '98 turbo 6spds (in the US).

I'm not sure about the '99-'02 Mkiv's available in Japan, but I suspect at least the 6spds all came with lsd as well...

Not sure if these codes apply to the mkIV but they do apply to the mkII and mkIII, but anyway
http://www.toyota-supra.info/forums/...ead.php?t=5813
I would think that it is the same for the mkIV, but I am not 100% on that.