CLOCKWATCH.  There are many applications that synchronize your PC clock with the extremely accurate atomic clock.  None seem to be more comprehensive or smoothly integrated than ClockWatch, available for a free trial at http://beaglesoft.com. Select intervals for adjustment and ClockWatch logs results and graphs out your PC accuracy (or, as is too often the case, inaccuracy.) This 32-bit application connects to any of a large number of time servers on a Win95/98/ME/NT/2K OS and can be run from batch files or across a network.  There are lots of display options, too, and the online documentation is fully adequate.

Neat Net Tricks is a twice-monthly publication offering tips and suggestions to enhance your use of the Internet.  You are welcome to subscribe for free at http://www.neatnettricks.com.