Ah that is the beauty of this program. You can ADD new names (and delete) or industries to the existing data base that is supplied to you. You can add materials and supplies as well. As for time period the is up to you as well. The database that is supplied to you is very large and a broad scope from the 50's era and up (dont quote me on it) to now in most cases. I have seen older companies listed as well. Again though this a great tool and it grows with you and your model railroad as you progress.
So having a saw mill that provides raw materials like pulp, chips, mulch, rough lumber, poles, and or logs etc. All of this can be listed and can be set up for distribution to various destinations or manfactures or companies who need the supplies. Then in return the saw mill can have a list of supplies it needs to run the mill wether it be fuel source, blades, belts, parts, and or chemicals etc. The program can be taylored to your needs. Again take a good look at the switching operations and notice his waybills and train order formats etc on the website. All these this can be taylored by you for your MRR. I hope I answered your questions. But really it is that easy. try the demos and take the time to veiw all of it. You will not be disappointed.
I have a question for all you guys out there that are using DCC on there layouts...
Are you using JMRI yet? I will post some interesting info for a follow up....
Alco out!