Aleph One (disambiguation)
# Aleph One (disambiguation)

Aleph One ($\aleph _{1}$) is the second aleph number.

Aleph One may also refer to:

* Aleph One (game engine), an enhanced version of the Marathon 2 game engine
* Elias Levy, computer security professional, former moderator of Bugtraq
* Aleph-1 (album), a 2007 album by Alva Noto
