Changes

== Additional Information ==

== Additional Information ==

* [http://www.bipm.org/en/bipm/tai/ BIPM - time] International Bureau of Weights and Measures, "the intergovernmental organization through which Member States act together on matters related to measurement science and measurement standards."

* [http://www.bipm.org/en/bipm/tai/ BIPM - time] International Bureau of Weights and Measures, "the intergovernmental organization through which Member States act together on matters related to measurement science and measurement standards."

* [http://www.nist.gov/pml/div688/ NIST Time and Frequency Division]

* [http://www.nist.gov/pml/div688/ NIST Time and Frequency Division]

* [http://leapsecond.com/ LeapSecond.com] "A web site dedicated to precise Time & Frequency"

* [http://leapsecond.com/ LeapSecond.com] "A web site dedicated to precise Time & Frequency"