# Liste des sigles de l'AAR débutant par P
## 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