Talk:Timeline of time measurement technology

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Copyright Permission to modify and distribute this and other timelines originally developed by Niel Brandt have been granted to wikipedia. See Talk:Timeline of transportation technology

What is it being listed at the end there? "Launch of data clock?" There were certainly digital clocks before 1999. —Preceding unsigned comment added by 67.150.217.174 (talk) 08:56, 7 February 2010 (UTC)[reply]