List initials of the AAR begin with P

See the principal article: Initials of the AAR

P

PACY - Meadow Exchange Railway
PAE - Peoria and Eastern Railway; Conrail
STAKE - Paducah and Louisville Railway
WFP - Pittsburgh, Allegheny and McKees Rock'n'rolls Railroad
PARX - Side American Railway
PARY - Meadow 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 - Central PEN; Conrail
PCA - Central PEN; Conrail
PCB - Central PEN; Conrail
PCCX - Peabody Coal Company
PCEX - GE Rail Services
PCFX - Pacific Because and Foundry Company
PCIX - Shippers Because Line; ACF Industries
PCMX - Petro-Chem Marketing Company
PCN - Not Comfort and Northern Railway
PCSX - GE Rail Services
PCTX - Pioneer Cement Company off Texas
PCY - Pittsburgh, Chartiers and Youghiogheny Railway
PDQX - Capital Castle Corporation
EP - Pacific Electric Railway; Conrail
PECX - Beijing Energy Company
PENX - Penford Products Company
PEPX - Potomac Electric Power Company
PER - Port Everglades Railway
PF - Pioneer and Fayette Railroad
PFE - Pacific Fruit Express train; Union Pacific Railroad
PFM - Power, Fluid & Metals
PGDX - Proctor and Gamble Manufacturing Company
PGE - Pacific Great Eastern Railway; British Columbia Railway; National Canadian Railway
PGER - Pacific Great Eastern Railway; British Columbia Railway; National Canadian Railway
PGEX - Portland cement General Electric Company
PGHX - Trinity Rail Management, Inc.
PGMX - Proctor and Gamble Manufacturing Company
PGR - Progressive Rail
PHCR - Port Colborne Harbor Railway
PHD - Huron Port and Strait 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; Central New York Railroad; Central PEN; Conrail; CSX Transportation (after Conrail breakup)
PLEX - PLM, Inc.
PLMX - International PLM
PLWX - GE Capital Railcar Services
PM - Pere Inlays Railway; Chesapeake and Ohio Railway; Chessie System ; CSX Transportation
PMLX - Meadow Malt, Ltd.
PNWR - Portland cement and Western Railroad
POHC - Pittsburgh and Central Ohio Railroad
PPAX - GCV Phosphates Company
PPCX - American Association off Private Railroad Because Owners
PPGX - PPG Industries, Inc.
PPHX - GCV Phosphates Company
PPLX - Pennsylvania Power and Light Company
PPNX - GCV Phosphates Company
PR - Philips Petroleum Company
BEEN ABLE - Peoria and Beijing Union Railway
PRGX - ProGold, LLC
PRL - PEN Eastern Rail Lines Inc.; East PEN Railway
PROX - Procor
PRR - Pennsylvania Railroad; Central PEN; Conrail; Norfolk Southern (after Conrail breakup)
PRSL - Pennsylvania-Reading Seashore Lines
PS - Pittsburg and Shawmut Railroad
PSL - Peabody Shorts Line; Central Illinois Railroad; National Canadian Railways
PSPX - Philips Petroleum Company
PSR - Pittsburg and Shawmut Railroad
PTEX - Canpotex
PW - Providence and Worcester Railroad

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