A web site dedicated to precise Time and Frequency

GPS, UTC and TAI Clocks (2001)

The state of the art in amateur timekeeping (2003)

GPS does not account for leap seconds

First atomic clock wristwatch (2003)

LeapSecond.com – A web site dedicated to precise Time and Frequency

Museum of HP Clocks

Why the Greenwich meridian moved

Climbing with Atomic Clocks

Project Great: General Relativity Einstein/Essen Anniversary Test (2005)