======Links======
[[http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=428936&prodTypeId=15351&prodSeriesId=428936&objectID=c01075682|HP Support Document]] Advisory: (Revision) HP ProLiant Servers Using Certain Dual-Core or More Than One Single-Core AMD Opteron Processor May Experience Incorrect Operating System Time When Running Systems That Use the System Time Stamp Counter]] \\
[[http://gotblogged.com/2007/05/03/time-travel-back-to-the-future-x86_64-style/|Time Travel: Back to the future, x86_64 style]] \\
[[http://blogs.technet.com/perfguru/archive/2008/02/18/explanation-for-the-usepmtimer-switch-in-the-boot-ini.aspx|Explanation for the USEPMTIMER switch in the boot.ini]] \\

======Applicaties======
[[http://tf.nist.gov/general/softwarelist.htm|NIST - Publishers of Time and Frequency Software]]