AE = Advanced Entitlement.

An AE is basically a systemwide bid that allows you to change positions (base, seat, equipment) via AE (award), MD (mandatory displacement) or VD (voluntary displacement)

There are generally 3-4 of these a year and there is a lot more that could be said about it. If you're wanting ATL, you will be able to bid for it via the AE process. Newhires are NOT frozen (seatlocked) so hopefully you'll be able to get to ATL quickly if you don't get it right off the bat.

Welcome aboard! You don't know how nice it is to see some newhires.