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The ampersand, also known as the and sign, is the logogram &, representing the conjunction "and". It originated as a ligature of the letters of the word et ...
The ampersand (&) has sometimes appeared at the end of the English alphabet, as in Byrhtferð's list of letters in 1011. [2] & was regarded as the 27th letter of the English alphabet, as taught to children in the US and elsewhere. [vague] An example may be seen in M. B. Moore's 1863 book The Dixie Primer, for the Little Folks. [3]
1718 (deriving from horizontal fraction bar, invented by Abu Bakr al-Hassar in the 12th century) Thomas Twining:
The history includes Hindu–Arabic numerals, letters from the Roman, Greek, Hebrew, and German alphabets, and a variety of symbols invented by mathematicians over the past several centuries. The historical development of mathematical notation can be divided into three stages: [4] [5]
Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.
English: Evolution of the ampersand Old Roman cursive, reed pen, 131 AD. New Roman cursive, middle of 4th century. New Roman cursive, ca 346 AD. Uncial: From a manuscript (St. Hilarius), before 509. Uncial: From a manuscript (St. Maximus), 7th century. Carolingian minuscule, 810.
The + sign is a simplification of the Latin: et (comparable to the evolution of the ampersand &). [7] The − may be derived from a macron ̄ written over m when used to indicate subtraction; or it may come from a shorthand version of the letter m itself. [8] From Johannes Widmann's book on "handy and pretty arithmetic for all merchants" [9] [10]
In Tagalog, the word at means 'and', so the symbol is used like an ampersand in colloquial writing such as text messages (e.g. magluto @ kumain, 'cook and eat'). In Thai, it is commonly called at, as in English. In Turkish, it is commonly called et, a variant pronunciation of English at. [citation needed]