The Complete Freebsd

FreeBSD is a full, professional quality, UNIX - compatible operating system. FreeBSD is based on Berkeley 4.4 BSD, developed by the University of California, Berkeley, and its contributors. It comes with industry standard X Window system (X11R6) for the PC, XFree86, along with both the KDE and Gnome desktop environments (and many others). You also get a rich set of ready-to-run X utilities, such as Netscape and Mozilla, xemacs, Tk 8.x, The Gimp, and much more.