The contemporary English-language alphabet, known as Roman style, consists of twenty-six letters. Each letter corresponds to one or more sounds, and the letters are combined in the order of sounds to make words. A letter is classed as either a consonant or a vowel, depending on how its sound is produced (vowels are a, e, i, o, u, and sometimes y and w).
The basic Roman alphabet is used by about one hundred languages, with slight variations. Some versions contain as few as twenty-one characters, some as many as thirty. Letters have specific names associated with them, which may differ with language, dialect, and history. "Z, for example, is usually called zed in all English-speaking countries except the US, where it is named zee. As elements of alphabets, letters have prescribed orders, although this too may vary by language. In Spanish, for instance, "ñ is a separate letter, sorted after n. In English, n and ñ are classified alike.
As symbols that indicate segmental speech, letters are associated with "phonetics. In a purely "phonemic alphabet, a single phoneme is denoted by a single letter, although in history and in practice letters often indicate more than one phoneme. There are more sounds, or phonemes, in English–about 44–than there are letters of the alphabet. A letter may therefore be associated with more than one phoneme, with the phoneme determined by the surrounding letters or etymology of the word. Regional accents have a significant effect; the letter a can range from five to twelve sounds depending on the origin of the speaker. As an example of positional effects, the letter c is pronounced [k] before a, o, u, or consonants (e.g. critical), but is pronounced [s] before e, i, or y (e.g. democracy). Conversely, the same phoneme may be shared by more than one letter, as shown by the c and s in fence and tense. A pair of letters designating a single phoneme is called a "digraph. Examples of digraphs in English include ch, sh, and th. A phoneme can also be represented by three letters, called a "trigraph. An example is the combination sch in German.
Letters may also have a numerical or quantitative value. This applies to "Roman numerals and the letters of other writing systems. In English, "Arabic numerals are typically used instead of letters. Greek and Roman letters are used as mathematical symbols in equations and expressions.
People and objects are sometimes named after letters, for one of these reasons:
The "Consistori del Gay Saber was the first literary academy in the world and held the "Floral Games to award the best "troubadour with the violeta d'aur top prize. "Guilhem Molinier, a member of the academy, gave a definition of the letter in his "Leys d'Amors (1328–1337), a book aimed at regulating then-flourishing "Occitan poetry:
Letra votz no es devisabla.
E per escriure convenabla.
Letra per miels esser exposta.
Es menor part de votz composta.
A letter is an indivisible sound
That is fit for writing;
A letter, to define it better,
Is the smallest part of a composite sound.
Before there were alphabets, there were pictographs, or symbols. Ancient Egyptian examples date to about 3500 BCE. Pictographs could communicate basic ideas, but were general and ambiguous if they were comprehensible at all. Tense, for example, could not be specified, and symbols do not necessarily carry meaning across cultures. Memorization of tens of thousands of symbols is a daunting task; children from cultures that use logograms–word symbols–to represent words take years longer to learn to read and write than children learning an alphabet. The relative ease of memorizing twenty-six letters contributed to the spread of literacy throughout the world.
The first "consonantal alphabet found emerged around 1800 BCE to represent the language of the Phoenicians, "Semitic workers in Egypt (see "Middle Bronze Age alphabets), and was derived from the alphabetic principles of the "Egyptian hieroglyphs. Our present Roman system derives from this Phoenician alphabet, which had twenty-two letters. Nineteen of our present letters evolved from the early Phoenician forms; letter shapes and order of appearance correspond closely. The "Greek alphabet, adapted around 800 BCE, added four letters. This was the first alphabet assigning letters not only to "consonant sounds, but also to "vowels. The Roman Empire brought the development and refinement of our Roman alphabet, beginning around 500 BCE. The Romans added or dropped certain letters to accommodate Greek and Etruscan words; they also experimented with styles such as cursive when writing in ink. By about the fifth century CE, the beginnings of lowercase letterforms began to emerge in Roman writing, but they did not come into common use until the end of the Middle Ages, a thousand years later.
Letter, borrowed from "Old French letre, entered "Middle English around 1200 CE, eventually displacing the native English term bocstaf (bookstaff). Letter is descended from the Latin littera, which may have descended from the Greek "διφθέρα" (writing tablet), via Etruscan.
More recently, the development of SMS (Short Message Service) technology is eliminating use of unnecessary letters in informal communication. Time pressure and limited character counts have introduced common abbreviations and variations such as gr8fl (grateful) and lite, as well as acronyms like idk (I don't know) and the ubiquitous LOL.
There are about twenty-six alphabets currently, with Arabic, Cyrillic, and Roman in widest use. The following alphabets, abjads, and individual letters are discussed in related articles. Each represents a different script:
"Assamese alphabet:অ, আ, ই, ঈ, উ, ঊ, ঋ, এ, ঐ, ও, ঔ, ক, খ, গ, ঘ, ঙ, চ, ছ, জ, ঝ, ঞ, ট, ঠ, ড, ঢ, ণ, ত, থ, দ, ধ, ন, প, ফ, ব, ভ, ম, য, ৰ, ল, ৱ, শ, ষ, স, হ, ড়, ঢ়, য়, ৎ, ং, ঃ, ঁ
"Hangul: ㄱ ㄲ ㄴ ㄷ ㄸ ㄹ ㅁ ㅂ ㅃ ㅅ ㅆ ㅇ ㅈ ㅉ ㅊ ㅋ ㅌ ㅍ ㅎ ㅏ ㅐ ㅑ ㅒ ㅓ ㅔ ㅕ ㅖ ㅗ ㅘ ㅙ ㅚ ㅛ ㅜ ㅝ ㅞ ㅟ ㅠ ㅡ ㅢ ㅣ
"Bopomofo: ㄅ ㄆ ㄇ ㄈ ㄉ ㄊ ㄋ ㄌ ㄍ ㄎ ㄏ ㄐ ㄑ ㄒ ㄓ ㄔ ㄕ ㄖ ㄗ ㄘ ㄙ ㄚ ㄛ ㄜ ㄝ ㄞ ㄟ ㄠ ㄡ ㄢ ㄣ ㄤ ㄥ ㄦ ㄧ ㄨ ㄩ ㄭ
"Ethiopic ሀ ለ ሐ መ ሠ ረ ሰ ቀ በ ተ ኀ ነ አ ከ ወ ዐ ዘ የ ደ ገ ጠ ጰ ጸ ፀ ፈ ፐ
"International Phonetic Alphabet - used to represent exact pronunciation
For other writing systems and their letters, see "List of writing systems.
Some writing systems have two major forms for each letter: an uppercase form (also called capital or "majuscule) and a "lowercase form (also called minuscule). Only two Roman letters, a and g, have more than one standard lowercase form. Upper- and lowercase letters represent the same sound, but serve different functions in writing. Capital letters are most often used at the beginning of a sentence, as the first letter of a proper name or title, or in headers or inscriptions. They may also serve other functions, such as in the "German language where all "nouns begin with capital letters. In practical terms, tests have proven that lowercase words are easier to read. They also take up less space on the page, a considerable benefit when materials such as paper and ink were scarce and valuable.
The terms uppercase and lowercase originated in the days of hand-set type for printing presses. Individual letter blocks were kept in specific compartments of drawers in a type case. Capital letters were stored in a higher drawer, or upper case.
A "typeface, or font, is a single, stylistically consistent set of designs for an alphabet. A particular font may alter standard forms of characters, may present them with different optical weight, or may angle or embellish their forms. In "calligraphy, letters are artistically handwritten and may or may not be consistent throughout a work.
Typography has traditionally been considered an art form, encompassing both letter design and the relationship of the letters to one another. Type designers strive for clarity and beauty in individual letterforms, as well as character in a font. Old fonts such as Bodoni, Caslon, and Garamond have been in wide use for centuries, with only slight modifications. Advances in print capabilities, new ways of viewing the written word, and changing aesthetics have led to refinements of classic typefaces as well as the introduction of entirely new designs. In the early nineteenth century, sans serif typefaces were first created. Serifs are the finishing strokes of letters, small extensions considered to enhance readability. Sans serif fonts (such as the one you are reading here) give a modern and informal impression, but are slightly less legible as text than serif faces. Without serifs, an uppercase I (I) is indistinguishable from a lowercase l (L).
The average distribution of letters, or the relative frequency of each letter's occurrence in text in a given language, can be obtained by analyzing large amounts of representative text. This information can be useful in "cryptography and for other purposes, such as song lyrics, as well. Letter frequencies vary in different types of writing. In English, the most frequently appearing ten letters according to Gaines  are, in descending order of frequency, e, t, a, o, n, i, s, h, r, l; according to Norvig ) e, t, a, o, i, n, s, r, h, l; according to Cook (2017) e, t, a, o, n, i, s, h, r, d.
Clodd, Edward (1904). The Story of the Alphabet. [New York]: McClure, Phillips & Co.
Man, John, (2005) . Alpha beta : how 26 letters shaped the Western world. [New York]: Barnes and Noble. "ISBN "076076610X. "OCLC 60936567.
Robinson, A (2003). "The Origins of Writing" in Crowley, David and Paul Heyer Communication in History : Technology, Culture, Society (Fourth Ed). [Boston]: Allyn and Bacon pp 34-40.
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