It may also help to note the significance of the first letter in the terms:
C terms require the seller to pay for shipping.
D terms mean that the seller or shipper’s responsibility ceases at a specified point, and they deal with who will pay pier, docking and clearance charges.
E terms mean that when the goods are ready to leave the seller’s premises, his responsibility ceases.
F terms mean that the primary cost of shipping is not met by the seller.