P PACY - Prairie Central Railway PAE - Peoria and Eastern Railway ; Conrail PAL - Paducah and Louisville Railway PAM - Pittsburgh, Allegheny and McKees Rocks Railroad PARX - Pan American Railway PARY - Prairie Trunk Railway PAUT - Pennsylvania and Atlantic Railroad ; Conrail PBFX - IBP, Inc. ; Tyson Foods PBL - Philadelphia Belt Line Railroad PBLX - Pillsbury PBNE - Philadelphia, Bethlehem and New England Railroad PBR - Patapsco and Back Rivers Railroad PBVR - Port Bienville Railroad PC - Penn Central; Conrail PCA - Penn Central ; Conrail PCB - Penn Central ; Conrail PCCX - Peabody Coal Company PCEX - GE Rail Services PCFX - Pacific Car and Foundry Company PCIX - Shippers Car Line ; ACF Industries PCMX - Petro-Chem Marketing Company PCN - Point Comfort and Northern Railway PCSX - GE Rail Services PCTX - Pioneer Cement Company of Texas PCY - Pittsburgh, Chartiers and Youghiogheny Railway PDQX - Castle Capital Corporation PE - Pacific Electric Railway ; Conrail PECX - Pekin Energy Company PENX - Penford Products Company PEPX - Potomac Electric Power Company PER - Port Everglades Railway PF - Pioneer and Fayette Railroad PFE - Pacific Fruit Express ; Union Pacific Railroad PFM - Power, Fluid & Metals PGDX - Proctor and Gamble Manufacturing Company PGE - Pacific Great Eastern Railway ; British Columbia Railway ; Canadian National Railway PGER - Pacific Great Eastern Railway ; British Columbia Railway ; Canadian National Railway PGEX - Portland General Electric Company PGHX - Trinity Rail Management, Inc. PGMX - Proctor and Gamble Manufacturing Company PGR - Progressive Rail PHCR - Port Colborne Harbour Railway PHD - Port Huron and Detroit Railroad ; Chessie System ; CSX Transportation PHL - Pacific Harbor Line PI - Paducah and Illinois Railroad PICK - Pickens Railroad PJR - Port Jersey Railroad PLCX - Pullman Leasing Company ; GE Capital Railcar Services PLE - Pittsburgh and Lake Erie Railroad ; New York Central Railroad ; Penn Central ; Conrail ; CSX Transportation (after Conrail breakup) PLEX - PLM, Inc. PLMX - PLM International PLWX - GE Capital Railcar Services PM - Pere Marquette Railway ; Chesapeake and Ohio Railway ; Chessie System ; CSX Transportation PMLX - Prairie Malt, Ltd. PNWR - Portland and Western Railroad POHC - Pittsburgh and Ohio Central Railroad PPAX - PCS Phosphate Company PPCX - American Association of Private Railroad Car Owners PPGX - PPG Industries, Inc. PPHX - PCS Phosphate Company PPLX - Pennsylvania Power and Light Company PPNX - PCS Phosphate Company PPRX - Phillips Petroleum Company PPU - Peoria and Pekin Union Railway PRGX - ProGold, LLC PRL - Penn Eastern Rail Lines Inc. ; East Penn Railway PROX - Procor PRR - Pennsylvania Railroad ; Penn Central ; Conrail; Norfolk Southern (after Conrail breakup) PRSL - Pennsylvania-Reading Seashore Lines PS - Pittsburg and Shawmut Railroad PSL - Peabody Short Line ; Illinois Central Railroad ; Canadian National Railways PSPX - Phillips Petroleum Company PSR - Pittsburg and Shawmut Railroad PTEX - Canpotex PW - Providence and Worcester Railroad
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