I'm looking forward to playing IST, but I have noticed a lot of inconsistency with the codes for trade goods. Particularly, there are differences between Book Two (pg 11-12 in particular) and the codes as used in Book Three.

For instance, when mining, F means fuel, but on the previous page there is F, Fe, and FU (presumably meaning Food? Fertilizer and Fuel).  Hoping that future editions update the codes so that they are used consistently across all volumes.