Thanks Dan.

I didn't realize that the letters meant different things for different airlines.So how do FT'ers "understand" each other -- are they just very familiar with the airline under discussion?

Maybe there could be a mini-glossary with the classes for some of the most frequently used airlines, just so they could all be in one place? Or is there a "reference section" for each airline that I don't know about?

Thanks! That was the fastest reply I've gotten in my life. Do you do customer service for a living?