AEF

acronym: Average emission factor
Found on http://cdiac.ornl.gov/pns/acronyms.html#A

AEF

AEF: see World War I.
Found on http://www.infoplease.com/ce6/history/A0909957.html

AEF

Allied Expeditionary Force
Found on http://www.secondworldwar.co.uk/glossa.html
No exact match found