XN may refer to:
Xnet (former eXgae) is a non-profit activist platform that develops and promotes alternative models for cultural dissemination and royalty management.
XNU is the computer operating system kernel developed at Apple Inc. since December 1996 for use in the macOS operating system and released as free and open-source software as part of the Darwin operating system.
The XNOR gate (sometimes, EXNOR, ENOR, and, rarely, NXOR, XAND) is a digital logic gate whose function is the logical complement of the exclusive OR (XOR) gate.
XnView is an image organizer and general-purpose file manager used for viewing, converting, organizing and editing raster images, as well as general purpose file management.
Xnews is a freeware Usenet newsreader created by Luu Tran. It is written in Delphi, and it is 100% GNKSA 2.0 compliant.
Xnc or X Northern Captain is a file manager program inspired by Norton Commander for various UNIX systems released under the GNU GPL.
GNU Xnee is a suite of programs that can record, replay and distribute user actions under the X11 environment.
In number theory, Fermat's Last Theorem (sometimes called Fermat's conjecture, especially in older texts) states that no three positive integers a, b, and c satisfy the equation an + bn = cn for any integer value of n greater than 2. The cases n = 1 and n = 2 have been known to have infinitely many solutions since antiquity.
Yiguandao (simplified Chinese: 一贯道; traditional Chinese: 一貫道; pinyin: Yīguàn Dào; Wade–Giles: I-Kuan Tao), meaning the Consistent Way or Persistent Way, is a Chinese folk religious sect that emerged from the Xiantiandao ("Way of Former Heaven") tradition in the late 19th century, in Shandong, to become China's most important redemptive society in the 1930s and 1940s, especially during the Japanese invasion.