When you work with a large amount of information, translations, or research sources, you often use copy-paste to paste some text blocks in different places with different formatting.
A per mille sign ‰ (also mentioned as per mil, per mill, permil, permill, or permille) represents thousandths, 1/10 percent, or the number of thousandths of something in total.
An angle ∠ is a geometric figure formed by two rays - sides of the angle, emanating from the point called the vertex of the angle or angular point.
The inverted question mark ¿, and inverted exclamation mark ¡, are punctuation marks that start, respectively, interrogative and exclamation sentences (or clauses) in writing in some languages, such as Spanish (called as signos de interrogacion and signos de exclamacion).
Angle brackets ⟨ ⟩, also known as pointy brackets, triangular brackets, diamond brackets, tuples, chevrons, guillemets, broken brackets, brokets, (often substituted informally by less-than < and greater-than signs >) are used in different areas, for example:
The plus-minus symbol ± (also known as plus or minus sign) is placed in front of an expression and means that the following value can be either positive or negative, more or less. This symbol often indicates:
The multiplication sign × (also known as the times sign or the dimension sign) is the mathematical sign for the multiplication operation. There are several popular representations for the multiplication operation: a cross (×), a dot (⋅), or an asterisk (∗).
A currency symbol or currency sign is a short designation for the name of a currency. It can be a letter, letter combination, hieroglyph, syllable, special sign or symbol, other varieties of graphemes, graphic abbreviations, abbreviations (including in the form of a letter code), conventional letter designations, as well as their combinations. Even a whole word can be used as a currency sign.
The check mark symbol ✓ (also known as a checkmark or tick mark) has different meanings in different cultures: as a sign of agreement, confirmation, to indicate the concepts "yes" or "correct"; and as a sign of refusal, reject, to represent the notions of "no" or "wrong".