User blog:Eugenekoh12/Personal Notes (Reference)

- AR / Alternate Reality Affected Things : The world is different / changed. Example includes : no chakra, no ninjutsu Popular in Fan Fictions for AR : Canon Characters are Modern Day High Schoolers

- AU / Alternate Universe Affected Things : The World is the same, but some (or most) basic canon facts are different. Example includes : Minato never died and is still Hokage. Popular in Fan Fictions for AU : Canon Characters personality changed due to the slightest change.

- AT / Alternate Timeline Affected Things : Place and Time of characters. Example includes : Time Travel changes, Naruto in US/UK Popular in Fan Fictions for AT : Change of Time, which causes the future to be changed.

- AH / All Human Characters Affected Things : Every single non-human characters are changed to humans. Popular in Fan Fictions for AH : Kyuubi is a female, and loves Naruto. Kyuubi is Naruto's Brother.