Not to forget the practice, found in places where clock(s) may be set to Zulu 
(as in UTC timezone), of indicating the datum by a Z with a vertical bar / 
slash through it - often below the 12 and about 30% of the size of the clock 
face, or centred and somewhat larger.  Horizontal and no bar options may well 
also be found in the wild; which may have spread into the positioning, network 
management and timing communities ?


-----Original Message-----
From: cctech [] On Behalf Of Craig Ruff via 
Sent: 27 April 2022 18:51
Subject: Not just slashed zeroes/ohs

Having gone through many mathematics courses it was common to also place a 
slash on the letter Z to distinguish it from the numeral 2. Also for persons 
from Europe where they slashed the numeral 7 to distinguish it from a numeral 1 
that commonly had an initial small upward stroke at the top when hand written.

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