Awhile back I was checking out different sites and fell into one that had a small search engine which would tell you what company or railroad a car or engine was from just by putting in the abb. letters, such as cnw, cp up, you get the idea, I didn't keep track of the site and was wondering if anyone else has ever seen this. I have been seeing alot of different car letters and would like to find out where they are from. Any help will be appreciated. Thanks