International Atomic Time

    (TAI) An international standard measurement
   of time based on the comparison of many atomic clocks.  TAI
   is maintained by the Bureau International des Poids et Mesures
   (BIPM), the world's governing body for civil atomic time
   measurement.  TAI is the basis for Coordinated Universal
   Time.

   BIPM
   (http://bipm.fr/enus/5_Scientific/c_time/time_1.html).

   (2001-08-02)