This is a Russian symbol, which means "First …". When used in mathematics textbooks, it refers to the first few chapters, which are generally used in high school or college textbooks in the 1980 s and 1990 s.

Special symbols refer to symbols that use fewer characters than traditional or commonly used symbols and are difficult to input directly, such as mathematical symbols, unit symbols, tabs, etc.

There are many kinds of special symbols, some of which can only be displayed if MS Gothic font (Japanese font) is installed.

Extended data:

Currency symbol:

1、? Renminbi symbol;

2、? Thai baht symbol (used in Thailand). Sub-symbols (divided into dollars, euros and other currencies);

3、? Col3on logo (used in Costa Rica and El Salvador);

4、? ECU logo (not widely used, and history; Replaced by Europe);

5、? Cruzeiro symbol (formerly used in Brazil);

6、? Euro logo;

7、? Korean won and Korean currency symbol;

8. Dollar symbol (in the United States, it is used as many other currencies, such as different pesos. Previously, Portuguese escudo was used as cifr6ao);

9、? Dracula symbol (formerly used in Greece);

10、? Oong logo (used in Vietnam).

Currency symbol 1 1, _ yen

Baidu Encyclopedia-Special Characters