| Re: Master-slave clocks explained (580216) | |||
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| Re: Master-slave clocks explained | |
| Posted by Stephen Bauman on Mon Mar 3 20:59:52 2008, in response to Re: Master-slave clocks explained, posted by RonInBayside on Mon Mar 3 19:56:39 2008.As the first real consumers of accurate time, railroads have probably done more for timekeeping than anything before Ships' navigation by sextant was the first consumer. | 
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