What season is after Dragon Ball

Well, there is the order for the Dragon Ball series:
1 - Dragon Ball (starts with Goku as a child and finishs when Goku marrys)
2 - Dragon Ball Z (starts when Gohan, Goku's son born, and finishs when Z Fighters beat Majin Buu)
3 - Dragon Ball GT (starts when Goku is training with Uub and finishs when Goku finds 7 Black Star Dragon Balls and the dragon grants his wish)
4 - Dragon Ball AF (i don't know about it but Goku there goes ssj5)
P.S. As for Dragon Ball Kai, that's like Dragon Ball Z but its redrawn.