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Unicode micro sign example
Last updated at 6:20 pm UTC on 15 December 2015
Characther U+00b5
http://www.fileformat.info/info/unicode/char/00b5/index.htm
has compatibility
Greek small letter mu
http://www.fileformat.info/info/unicode/char/03bc/index.htm
"The correct symbol for 'micro' is the actual Greek lowercase mu."
http://net.incorrectcode.news/question/9615/how-you-can-compare-unicode-characters-that-ldquolook-alikerdquo/
http://stackoverflow.com/questions/20674577/how-to-compare-unicode-characters-that-look-alike