Page "Numero sign" Paragraph 15

U + 2116 NUMERO SIGN is provided both for Cyrillic use, where it looks like < nowiki >" N " followed by raised, underlined small " o "</ nowiki >, and for compatibility with Asian standards, where it looks like < nowiki >" N " followed by raised, underlined small " o ", followed by a period </ nowiki >.

… Instead of using a special symbol, French practice is to use an " N " or an " n ", according to context, followed by a superscript small letter " o " ( N < sup > o </ sup > or n < sup > o </ sup >; plural N < sup > os </ sup > or n < sup > os </ sup >).

Legacy data encoded in ISO / IEC 8859-1 ( Latin-1 ) or other 8-bit character sets may also have represented the numero sign by a sequence of " N " followed by the degree sign ( U + 00B0 degree sign ).

Implementations working with legacy data should be aware of such alternative representations for the numero sign when converting data.