Perhaps you were looking for one of these?

• BSYU BSYU
• CATS Charlotte Area Transit System
• COPU Maas Intermodal Systems
• CQPA Central Columbiana & Pennsylvania RR
• CSIX Cycle Systems Inc.
• CSSX Cycle Systems Scrap
• FLAX Flexsys America L.P.
• GASC Georgia, Ashburn, Sylvester & Camilla Ry
• IRRS International Rail Road Systems Incorporated
• MPA Maryland and Pennsylvania Railroad
• NCHU North American Container System
• NCIU North American Container System (TRAC Lease Incorporated)
• NCKU North American Container System
• NCRU North American Container System (Transamerica Leasing)
• NCWU North American Container System
• NEMX Ogden Martin Systems of Montgomery
• NLTX National Starch and Chemical Company d/b/a Speciality Synthe
• NSXU North American Container System
• OHPA Ohio and Pennsylvania Railroad Company
• PAPX Pennsylvania Pullmans Incorporated
• PENNSYLVAN PENNSYLVAN
• PGCX Peoples Gas System Incorporated
• PLHU Armour Transportation Systems
• PNRR Pennsylvania Northeastern
• PNSX Chem-Nuclear Systems LLC
• PPLX Pennsylvania Power and Light Company
• PRR Pennsylvania Railroad
• PRSL Pennsylvania Reading Seashore
• PSCC Pennsylvania & Southern Railway LLC
• RJCP R.J. Corman Railroad Company/ Pennsylvan
• SBD Seaboard System
• SCR Sydney Coal Railway
• SEIU Strategic Equipment Systems Incorporated
• SKSX SAFETY KLEEN SYSTEMS INC
• SPAX Southeastern Pennsylvania Transportation (SEPTA)
• STPX Strategic Transport Systems Incorporated
• SWP Southwest Pennsylvania Railroad
• SYDNEY SYDNEY
• SYLX SYLX
• SYSX United States Systems Incorporated
• WNYP Western New York and Pennsylvania
• YFSY YFSY