> Can anyone find a me definitive reference as to whether one should
> abbreviate bits as 'B' and bytes as 'b'   or  vice versa?

Where there is no standard the people perish :-)

I believe this is driven almost completely by usage - might makes right. 
(BIMBW)

My convention, and one which I do not reall having seen inverted, is B for 
byte and b for bit.
The problem is using the same symbol for two different variables.
IF this was an SI unit then both would be "b" (there having been no Mrs Byte 
or Miss Bit that this was named after) so one would have a different symbol 
or symbo pair. eg By or Bi


> Thank you all for listening , that's much better now :-)

No. It just gets worse.


        RM

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