the ATF
That would be the BATFE, who really doesn’t deserve one letter much less 5 going on infinity.
Barack's
Armed
Torch
ForcE
I think every few years, they add another letter.
At some point, it will be Bureau of Alcohol, Tobacco, Firearms, Pornography, Caffeine, Fat, Salt, NSAIDS, Energy Drinks, Hate Speech, and Journalistic Integrity (of course, working closely with MSNBC on that last one).