| Sidebar : Related Reading
The following Web sites are loaded with good information on timing products and other time-related information. 
 
The ntp home page, maintained by the author of ntp, David Mills. This site contains the ntp distribution and links to other time-related sites: 
http://www.eecis.udel.edu/~ntp/ 
 
The National Institute of Standards and Technology home page. A good site for time information, UTC and related time (ACTS) distribution software: 
http://www.bldrdoc.gov/timefreq/ 
 
Time and date notation: 
http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html 
 
Datum Inc.'s (and Bancomm) home page, a manufacturer of time processing equipment: 
http://www.datum.com/ 
 
TrueTime's home page, a manufacturer of time processing equipment: 
http://www.truetime.com/ 
 
Horology is the science of time, timekeepers (clocks, watches), and timekeeping: 
http://www.horology.com/
 
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