Could anyone point me towards a list of all of the flight ticket codes and what they mean? I'm fairly sure that F=First and J=business but I know that there are many more codes and wondered if there was a definative list anywhere?

Having followed these threads for a while it's clear to me that most of you know exactly what they are but I'm still clueless! For eg, on a recent trip in business my outbound fare was J and my return D but both in the same cabin.

Thanks in advance