NTP was designed with attention to details which might introduce systematic bias into the computations, and the protocol is capable of syncronizing with even the most precise external time sources.
The NTP protocol supported by xntpd is defined in RFC's 1059, 1119, and 1305 for versions 1, 2, and 3, respectively. For more information on how NTP works, and how to configure a campus of xntpd daemons, load the optional Debian package 'xntp3-doc'.
A good place to start is /usr/doc/xntp3/index.html.
Note that under XFree86, the X11 implementation for Linux, Control- Alt-Backspace will defeat the locking mechanism and return your console back unless you put "DontZap" in your XF86Config file. 'xdm' returns to the login prompt. Control-Alt-F1 (among others) will defeat locking mechanism with virtual terminals, so make sure that you are not logged onto any virtual consoles.
With this program you can attach icons to your various X10 devices and see them displayed on a toolbar as well as a floorplan of your own. You can also read, write and edit programs to download to the CP-290 controller.
This comes by default with XEmacs.