Wait-list Question **PLEASE HELP**

Ok so I was recently admitted off of the wait-list into the college of letters and science! I’m a bit confused though… it says I have 3 options: 1) FPF 2) global edge 3) start during the spring semester. Can someone explain FPF to me? It says that it’s already filled, but do people usually drop out and open up new spaces? I just bought a plane ticket to fly up to the campus to check it out, but honestly I’m already pretty set on another school and I wont really consider Cal unless I can start there during the fall 2015 session. Is there any way to start during the fall semester without doing FPF? Any advice would be greatly appreciated. Thanks!