xfree86 project, inc.
operating system, graphics
a non-profit organisation that produces xfree86, a freely redistributable implementation of the x window system that runs on unix and unix-like operating systems and os/2. the xfree86 project has traditionally focused on intel x86 based platforms (hence the “86”), but the current release supports other platforms.
xfun a polymorphic functional language which is a cross between sml and russell, developed by s. dalmas firstname.lastname@example.org of inria in 1991, and intended for computer algebra. [“a polymorphic functional language applied to symbolic computation”, s. dalmas, proc intl symp symb alg comp, berkeley 1992]. (1995-02-03)
xfs extensions for financial services
xga extended graphics array
xi baryon xi baryon (zī, sī, ksē) either of two subatomic particles in the baryon family, one neutral and one negatively charged, with m-sses of 2,572 and 2,585 times that of the electron and average lifetimes of 2.9 × 10-10 and 1.6 × 10-10 seconds. see table at subatomic particle.