Three Military "States":
AA, which stands for Armed Forces (the) Americas
AE, which stands for Armed Forces Europe
AP, which stands for Armed Forces Pacific
Two "City" equivalents:
APO, which stands for Army/Air Post Office
FPO, which stands for Fleet Post Office
if a military member is out of country for a length of time, they get an apo address to recieve mail at, instead of relying on the host countries mail system. the only drawback is that apo only accepts delivery from usps, no fedex or ups or the like (which a LOT of companies have switched to using as their sole means of shipping). there are companies now that have a service so you can buy an item and send it to them, and then they will send it usps to you, but you have to pay 2 shipping costs and they usually have a fee attached to it. besides, if i wanted that i could just have it sent to my wife and have her send it to me...but then theres still the 2 separate shipping costs...unless a company send ups or fedex for free...?