Continental

A = Purchased First Class
D = Domestic Upgrade on Int'l First Class
F = Upgradeable First Class
Y = Fully Refundable Coach
H = Slightly Discounted Non-Refundable Coach
K = Non-Refundable Coach
B = Non-Refundable Coach
V = Non-Refundable Coach
Q = Non-Refundable Coach
T = Non-Refundable Coach (this class is what they typically reserve to match low fare carrier fare sales)

V, Q and T are often excluded when using promotional discounts