[ntp:questions] what are and

Mark C. Stephens marks at non-stop.com.au
Wed Feb 1 15:36:30 UTC 2012

Hello people,

Just a probably stupid question, but looking at 2 of the clocks I reference, one is using and 

I can't find any reference as to what they are and I am curious!

Someone please enlighten me?

Many thanks,

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