Originally posted by FFSaver:
is there a way to "learn" the various seat classes? i.e. C, F, Y, etc.
You should be able to find quite a few threads on this topic by using the search feature.
However, the short story is that F is for First, C for Busines, and Y, B, ... for Economy and its various discounted flavors. Some letters (D on NW/CO I believe) are reserved for F seats available for elite upgrades.