On Mon, Jan 25, 2010 at 4:55 PM, Veronique Kessler
<vkessler(a)wikimedia.org> wrote:
Thanks for the comment. The "mm" signifies
millions which is the amount
the timeline is representing, $6 million from 125,000 donors globally.
If we were to replace it with one "m", that would signify only $6 thousand.
See also:
http://wiki.answers.com/Q/What_is_abbreviation_of_million
I'm not sure whether to take you seriously given the reference at that
link but anyway...
How about the fifth bullet point here:
http://en.wikipedia.org/wiki/Wikipedia:MoS#Large_numbers