Bildnachweis
Titel: Archiv des Autors (Virtual Clocks)
Allgemeines zur Zeit: PTB, http://www.ptb.de (Atomuhr CS-2, Zeitzonen)
Zeit und Computer: DevGuy, http://www.devguy.com (WinCVS DST Bug)
NTP: Autor - http://sstaiger.de (NTP-Logo, Datenstrukturen); David Mills - http://www.eecis.udel.edu/~ntp/ (Foto David Mills)
NTP-Distribution: David Mills, http://www.eecis.udel.edu/~ntp/ (timeSync Logo); PTB, http://www.ptb.de (Anbindung Atomuhr)
Solaris: Sun, http://www.sun.com/software/solaris (Sun-Logo)
Mac OS X: Apple, http://www.apple.com/about/webbadges/ (MacOS-Logos); Sebastian H. Schenk, http://www.prince-of-java.de (Screenshots Mac OS X)
Linux: Larry Ewing, http://www.isc.tamu.edu/~lewing/linux/ (Tux); Debian Project, http://www.debian.org/ (Debian Logo und Schriftzug)
Windows: Microsoft, http://www.windows.com/windows, http://www.windows.com/windows2000 (Windows-Logos); AnalogX - http://www.analogx.com (AnalogX Logo); NIST, http://www.boulder.nist.gov (NIST-Logo)
Fragen?: David Mills, http://www.eecis.udel.edu/~mills/ntp/servers.htm, ursprünglich NBS Special Publication 432 (vergriffen) (ToneA)
Nicht näher bezeichnete Screenshots: Simon Staiger