http://www.rainer-klute.de/~klute/Installation/NTP.html http://www.eecis.udel.edu/~ntp/index.html - The purpose of this server is to provide the latest information on Network Time Protocol (NTP) and other related clock synchronization products. http://www.eecis.udel.edu/~ntp/ntpfaq/NTP-a-faq.htm - Understanding and using the Network Time Protocol