Aleph One (disambiguation)

Aleph One (${\mathrm{\aleph }}_1$) 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