What is an OIPC?

I was watching a train video in which the narrator was constantly describing trains with acronyms like West bound OIPC or East bound ****. Where can I find out what these terms stand for? Thanks.

Rich

The letters stand for a departing and arriveing city: For exsample conrail train BUSY stands for Buffalo-to-Syracuse its an east bound general fraght train. When the same train turns around to go West it becomes SYBU Syracuse-to-Buffalo.

Wow, thanks :D