XF may refer to:
The XFL was a professional American football league which played one season in 2001. It was operated as a joint venture between the World Wrestling Federation (WWF, now known as WWE) and NBC.
The NASCAR Xfinity Series is a stock car racing series organized by NASCAR. It is promoted as NASCAR's "minor league" circuit, and is considered a proving ground for drivers who wish to step up to the organization's top level circuit, the Monster Energy NASCAR Cup Series.
Xfinity is a brand of Comcast Cable Communications, LLC, a subsidiary of the Comcast Corporation, used to market consumer cable television, internet, telephone, and wireless services provided by the company.
XFS is a high-performance 64-bit journaling file system created by Silicon Graphics, Inc (SGI) in 1993. It was the default file system in the SGI's IRIX operating system starting with its version 5.3; the file system was ported to the Linux kernel in 2001. As of June 2014, XFS is supported by most Linux distributions, some of which use it as the default file system.
Xfce (pronounced as four individual letters) is a free and open-source desktop environment for Unix and Unix-like operating systems, such as Linux, Solaris, and BSD.
XFree86 was an implementation of the X Window System. It was originally written for Unix-like operating systems on IBM PC compatibles and was available for many other operating systems and platforms.
The XFL Draft was the only draft for the single-season XFL football league. The draft took place over a 3 day time period from October 28, 2000 to October 30, 2000 during which time a total of 475 players were selected by the league's 8 teams from a pool of approximately 1,600 or so eligible players.
XForms is an XML format used for collecting inputs from web forms. XForms was designed to be the next generation of HTML / XHTML forms, but is generic enough that it can also be used in a standalone manner or with presentation languages other than XHTML to describe a user interface and a set of common data manipulation tasks.
Xfire (pronounced "X-Fire") was a proprietary freeware instant messaging service for gamers that also served as a game server browser with various other features.