Unicode Explained

• Estimated symbol℮ (U+212E), originally letter “e” in a particular shape but defined

by the European Union as a specific symbol used in packaging to denote that a

certain accuracy is guaranteed in designating volume, mass, or other quantity,

• Numero sign № (U+2116), used in some languages (with some glyph variation

by language) to mean “number” (e.g., “№ 1” means much the same as “#1”).

Compatibility equivalent to the letter pair “No”.

• Trademark sign ™ (U+2122), used much the same way as the registered sign ®

but about unregistered trademarks. Compatibility equivalent to the letter pair

“TM” in superscript style, but glyphs vary a lot.

This block does not contain all Unicode characters that have originally been formed as

stylized variants of letters. Some such characters belong to other blocks due to the

history of character codes.

Some characters in this block are redundant duplicates of normal letters but included

into Unicode for compatibility. For example, although there is a character named “kel-

vin sign” in this block, it is not meant to be used instead of the normal letter “K” when

expressing thermodynamic temperatures. The “kelvin sign” has been taken into Uni-

code only to allow existing data to be converted to Unicode so that a distinction between

normal “K” and a kelvin sign is preserved, if it exists in the original data.

Thus, contrary to what many people think after ...