"The Time and Frequency Division, part of NIST's Physics Laboratory, maintains the standard for frequency and time interval for the United States, provides official time to the United States, and carries out a broad program of research and service activities in time and frequency metrology." At this website, visitors can find online exhibits about ethnic and historical calendars, the history of...

NAWCC has developed a Web site illustrating the non-profit organization's activities and services dedicated to the study of horology (timekeeping). Utilizing the message board, visitors can take part in discussions with others interested in the art and science of timekeeping. Users can have their watch and clock research questions answered by The Library and Research Center at the National Watch...

The prominent computer science Danny Hillis envisions a 10,000-year clock, one that will put current perceptions of the future into a different perspective. This dream is now becoming a reality, and this Web site discusses many of the design principles that must be considered to make it fool proof. Items that need to be decided include what to display, how to display it, how to accurately time the...