First of all, thanks to all who responded- you've satisfied my curiousity!
In regard to the T and F marks, I could be wrong... It's been awhile since I've actually been in there with a timing light and the manual, so the memories are not too clear. Heck, now come to think of it, I don't remember what order they come in! I guess this is a good thing, since I'm finally at the point where I'm riding it more than working on it!
As for CB- I also heard somewhere that it meant City Bike, but I like Raul's explanation better!
(Raul, it's good to have you back with us again!)
Thanks, guys!