If you are a developer and not having logistics domain knowledge and want to quickly gain some insight, here are some basic logistics terms that you need to be familiar with.

Carrier: Carrier is the service provider(SP) for freight movement from one location to another. These are transportation service companies that typically own transportation equipment like trucks, cargo planes, vessel ships, etc. Each carrier has four letter SCAC code (Standard Carrier Alpha Code) that is used on all the shipping documents.