▁Express ▁ ▁N RC ▁ ▁- ▁Mer ch ants ▁Des patch ▁Transport ation ▁Corporation ; ▁National ▁Re fr iger ator ▁Car ▁line ▁ ▁N RC U ▁- ▁Ned l loyd ▁Road ▁C argo ▁ ▁N RC X ▁- ▁Northern ▁Rail ▁Car ▁Corporation ▁ ▁NR D X ▁- ▁Nord ic ▁W are house , ▁Inc . ▁ ▁N RE X ▁- ▁National ▁Railway ▁Equ ip ment ▁Company ▁ ▁NR H X ▁- ▁National ▁Railway ▁Historical ▁Society ▁ ▁N RI ▁ ▁- ▁Neb k ota ▁Railway ▁ ▁N RI X ▁- ▁National ▁Re fr iger ants , ▁Inc . ▁ ▁N RL X ▁- ▁Nor R ail ▁ ▁NR M X ▁- ▁National ▁Rail road ▁Museum ▁ ▁NR N Y ▁- ▁Northern ▁Rail road ▁( New ▁York ) ▁ ▁NR P X ▁- ▁North rop ▁Corporation ▁ ▁NR R ▁ ▁- ▁Nob les ▁Rock ▁Rail road ▁ ▁N RS U ▁- ▁N ipp on ▁R iku - un ▁Sang yo ▁Company ▁ ▁N RT X ▁- ▁Regional ▁Transport ation ▁Author ity ▁( T ennessee ); ▁Music ▁City ▁Star ▁ ▁NS ▁▁ ▁- ▁Nor folk ▁Southern ▁Railway ▁( former ); ▁Southern ▁Railway ; ▁Nor folk ▁Southern ▁Railway ▁ ▁NS AX ▁- ▁National ▁Ste el ▁Corporation ▁ ▁NS C ▁ ▁- ▁National ▁Ste el ▁Car , ▁Ltd . ▁ ▁NS CT ▁- ▁Ni ag ara , ▁St . ▁C ath ar ines ▁and ▁Toronto ▁Railway ▁ ▁NS C X ▁- ▁National ▁Ste el ▁Car ▁Corporation ▁ ▁NS F Z ▁- ▁Nor folk ▁Southern ▁Railway ▁ ▁NS HR