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Em dash, En dash ° Degree sign: Masculine ordinal indicator * * * Dinkus: Asterism, Fleuron, Dingbat (many) Dingbat: Dinkus, Fleuron ⌀ Diameter: Ø (Scandinavian orthography), Slashed zero; empty set " Ditto mark: Quotation mark: ÷: Division sign: Slash (Solidus) (/), Obelus Dotted circle (Used as a generic placeholder when describing ...
The less-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, <, has been found in documents dated as far back as the 1560s.
The plus sign (+) and the minus sign (−) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1]
Upside-down marks, simple in the era of hand typesetting, were originally recommended by the Real Academia Española (Royal Spanish Academy), in the second edition of the Ortografía de la lengua castellana (Orthography of the Castilian language) in 1754 [3] recommending it as the symbol indicating the beginning of a question in written Spanish—e.g. "¿Cuántos años tienes?"
The abbreviations nro. and núm. are also acceptable. The numero sign, either as a one-character symbol № or composed of the letter N plus superscript "o" (sometimes underlined or substituted by the ordinal indicator, º), is common in Latin America, where the interpolated period is sometimes not used in abbreviations.
In English, the question mark typically occurs at the end of a sentence, where it replaces the full stop (period). However, the question mark may also occur at the end of a clause or phrase, where it replaces the comma (see also Question comma):
In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
Among English-speaking typographers the symbol may be called a "slashed O" [1] or "o with stroke". Although these names suggest it is a ligature or a diacritical variant of the letter o , it is considered a separate letter in Danish and Norwegian, and it is alphabetized after z — thus x , y , z , æ , ø , and å .