Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym NIWX is...

NIWX is

  • Northern Illinois & Wisconsin Railway Corporation

NIWX is also in:

Acronym Definition Searched: IFB SOQ 51546 SGW SOUL 58206 OMA DCPS DDR PT 37308 PFE BBA 33858 SLR