Pocket Horology - National chapter of the NAWCC dedicated to collaborative research on the history and horology of pocket watches.

Clockstop.com - Providing a quality Horological reference site for collectors and repairers alike.

Horology - A Great Hobby - A very basic introduction to how electric clocks work, with animated pictures. Also a collection of cheap electric clocks with pictures and descriptions.

Antique Horology - The Horological Foundation's directory of web sites for watches, clocks, instruments and barometers.

Leap Year Frequently Argued Questions - A humorous approach towards explaining the nature of leap years, in particular why 2000 is a leap year.

Horology - Robert Terwilliger - A portrait gallery of over 135 outstanding horologists, past and present.

Clock a History - A brief history of time keeping. How mankind has used the sun, water, candles, sand, pendulums, springs, electronics, tuning forks, quartz crystals, etc. to tell time.

How Stuff Works: Time - Complete five-part explanation of time and how it is measured, including information about clocks, time zones, calendars, BC and AD.

Why Time is Absolute, and Relative, But Never Universal - An article by Vincent Sauvé elaborating upon a materialist view of the absolute and relative nature of time.

On Time - The Smithsonian Institute's exhibition on the changing ways we have measured, used, and thought about time over the past three hundred years.

How The Days of the Week Got Their Names - A short history of the week and each day of the week.

Leap Year Calculation for Year 2000 - A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year.

Louis Essen - Autobiography of the physicist who built the world's first operational atomic clock.

48 Time - A descriptive presentation on the interaction of time of day and day of the week with the International Date Line.

Daylight Saving Time - History of daylight saving time and how we use it to save energy.