There are some First and Business codes which you have ommitted -

F - Full fare First Class (1w)
A - Discounted First Class (1w)
J - Full fare Business Class (1w)
C - Slight discounted Business Class (CX)
D - Discounted Business Class (1w)
I - Deep discount Business Class (CX, AY)

OneWorld RTW tickets are booked in A and D class respectively. Note that A seats are extremely limited on some flights. I have been on waitlist for a BA flight in A class between LAX and LHR for 3 weeks now and it seems that it may never clear because BA only wants to give preferences to their 'full' fare passengers!