The Central Tano or Akan languages are languages of the Niger-Congo family (or perhaps the theorised Kwa languages ) spoken in Ghana and Ivory Coast by the Akan people .
97-533: There are two or three languages, each with dialects that are sometimes treated as languages themselves: All have written forms in the Latin script . This article about Volta–Congo languages is a stub . You can help Misplaced Pages by expanding it . Latin script The Latin script , also known as the Roman script , is a writing system based on the letters of the classical Latin alphabet , derived from
194-518: A diaeresis was sometimes used to indicate the start of a new syllable within a sequence of letters that could otherwise be misinterpreted as being a single vowel (e.g., "coöperative", "reëlect"), but modern writing styles either omit such marks or use a hyphen to indicate a syllable break (e.g. "co-operative", "re-elect"). Some modified letters, such as the symbols ⟨ å ⟩ , ⟨ ä ⟩ , and ⟨ ö ⟩ , may be regarded as new individual letters in themselves, and assigned
291-652: A lingua franca , but Latin was widely spoken in the western half, and as the western Romance languages evolved out of Latin, they continued to use and adapt the Latin alphabet. With the spread of Western Christianity during the Middle Ages , the Latin alphabet was gradually adopted by the peoples of Northern Europe who spoke Celtic languages (displacing the Ogham alphabet) or Germanic languages (displacing earlier Runic alphabets ) or Baltic languages , as well as by
388-529: A shift function (like in ITA2 ), which would allow more than 64 codes to be represented by a six-bit code . In a shifted code, some character codes determine choices between options for the following character codes. It allows compact encoding, but is less reliable for data transmission , as an error in transmitting the shift code typically makes a long part of the transmission unreadable. The standards committee decided against shifting, and so ASCII required at least
485-475: A ⟩ , ⟨ e ⟩ , ⟨ i ⟩ , ⟨ o ⟩ , ⟨ u ⟩ . The languages that use the Latin script today generally use capital letters to begin paragraphs and sentences and proper nouns . The rules for capitalization have changed over time, and different languages have varied in their rules for capitalization. Old English , for example, was rarely written with even proper nouns capitalized; whereas Modern English of
582-522: A BS (backspace). Instead, there was a key marked RUB OUT that sent code 127 (DEL). The purpose of this key was to erase mistakes in a manually-input paper tape: the operator had to push a button on the tape punch to back it up, then type the rubout, which punched all holes and replaced the mistake with a character that was intended to be ignored. Teletypes were commonly used with the less-expensive computers from Digital Equipment Corporation (DEC); these systems had to use what keys were available, and thus
679-500: A European CEN standard. In the course of its use, the Latin alphabet was adapted for use in new languages, sometimes representing phonemes not found in languages that were already written with the Roman characters. To represent these new sounds, extensions were therefore created, be it by adding diacritics to existing letters , by joining multiple letters together to make ligatures , by creating completely new forms, or by assigning
776-458: A character count followed by the characters of the line and which used EBCDIC rather than ASCII encoding. The Telnet protocol defined an ASCII "Network Virtual Terminal" (NVT), so that connections between hosts with different line-ending conventions and character sets could be supported by transmitting a standard text format over the network. Telnet used ASCII along with CR-LF line endings, and software using other conventions would translate between
873-476: A distinct letter in the alphabetic order until the 19th century. By the 1960s, it became apparent to the computer and telecommunications industries in the First World that a non-proprietary method of encoding characters was needed. The International Organization for Standardization (ISO) encapsulated the Latin alphabet in their ( ISO/IEC 646 ) standard. To achieve widespread acceptance, this encapsulation
970-569: A doubled V (VV) used to represent the Voiced labial–velar approximant / w / found in Old English as early as the 7th century. It came into common use in the later 11th century, replacing the letter wynn ⟨Ƿ ƿ⟩ , which had been used for the same sound. In the Romance languages, the minuscule form of V was a rounded u ; from this was derived a rounded capital U for the vowel in
1067-752: A form of the Greek alphabet which was in use in the ancient Greek city of Cumae in Magna Graecia . The Greek alphabet was altered by the Etruscans , and subsequently their alphabet was altered by the Ancient Romans . Several Latin-script alphabets exist, which differ in graphemes, collation and phonetic values from the classical Latin alphabet. The Latin script is the basis of the International Phonetic Alphabet , and
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#17327654072761164-498: A line terminator. The tty driver would handle the LF to CRLF conversion on output so files can be directly printed to terminal, and NL (newline) is often used to refer to CRLF in UNIX documents. Unix and Unix-like systems, and Amiga systems, adopted this convention from Multics. On the other hand, the original Macintosh OS , Apple DOS , and ProDOS used carriage return (CR) alone as
1261-605: A line terminator; however, since Apple later replaced these obsolete operating systems with their Unix-based macOS (formerly named OS X) operating system, they now use line feed (LF) as well. The Radio Shack TRS-80 also used a lone CR to terminate lines. Computers attached to the ARPANET included machines running operating systems such as TOPS-10 and TENEX using CR-LF line endings; machines running operating systems such as Multics using LF line endings; and machines running operating systems such as OS/360 that represented lines as
1358-639: A process termed romanization . Whilst the romanization of such languages is used mostly at unofficial levels, it has been especially prominent in computer messaging where only the limited seven-bit ASCII code is available on older systems. However, with the introduction of Unicode , romanization is now becoming less necessary. Keyboards used to enter such text may still restrict users to romanized text, as only ASCII or Latin-alphabet characters may be available. ASCII ASCII ( / ˈ æ s k iː / ASS -kee ), an acronym for American Standard Code for Information Interchange ,
1455-641: A proposal endorsed by the Mejlis of the Crimean Tatar People to switch the Crimean Tatar language to Latin by 2025. In July 2020, 2.6 billion people (36% of the world population) use the Latin alphabet. By the 1960s, it became apparent to the computer and telecommunications industries in the First World that a non-proprietary method of encoding characters was needed. The International Organization for Standardization (ISO) encapsulated
1552-600: A reserved device control (DC0), synchronous idle (SYNC), and acknowledge (ACK). These were positioned to maximize the Hamming distance between their bit patterns. ASCII-code order is also called ASCIIbetical order. Collation of data is sometimes done in this order rather than "standard" alphabetical order ( collating sequence ). The main deviations in ASCII order are: An intermediate order converts uppercase letters to lowercase before comparing ASCII values. ASCII reserves
1649-541: A reserved meaning. Over time this interpretation has been co-opted and has eventually been changed. In modern usage, an ESC sent to the terminal usually indicates the start of a command sequence, which can be used to address the cursor, scroll a region, set/query various terminal properties, and more. They are usually in the form of a so-called " ANSI escape code " (often starting with a " Control Sequence Introducer ", "CSI", " ESC [ ") from ECMA-48 (1972) and its successors. Some escape sequences do not have introducers, like
1746-404: A seven-bit code. The committee considered an eight-bit code, since eight bits ( octets ) would allow two four-bit patterns to efficiently encode two digits with binary-coded decimal . However, it would require all data transmission to send eight bits when seven could suffice. The committee voted to use a seven-bit code to minimize costs associated with data transmission. Since perforated tape at
1843-458: A single language. For example, in Spanish, the character ⟨ ñ ⟩ is considered a letter, and sorted between ⟨ n ⟩ and ⟨ o ⟩ in dictionaries, but the accented vowels ⟨ á ⟩ , ⟨ é ⟩ , ⟨ í ⟩ , ⟨ ó ⟩ , ⟨ ú ⟩ , ⟨ ü ⟩ are not separated from the unaccented vowels ⟨
1940-532: A small symbol that can appear above or below a letter, or in some other position, such as the umlaut sign used in the German characters ⟨ ä ⟩ , ⟨ ö ⟩ , ⟨ ü ⟩ or the Romanian characters ă , â , î , ș , ț . Its main function is to change the phonetic value of the letter to which it is added, but it may also modify the pronunciation of a whole syllable or word, indicate
2037-470: A special function to pairs or triplets of letters. These new forms are given a place in the alphabet by defining an alphabetical order or collation sequence, which can vary with the particular language. Some examples of new letters to the standard Latin alphabet are the Runic letters wynn ⟨Ƿ ƿ⟩ and thorn ⟨Þ þ⟩ , and the letter eth ⟨Ð/ð⟩ , which were added to
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#17327654072762134-504: A specific place in the alphabet for collation purposes, separate from that of the letter on which they are based, as is done in Swedish . In other cases, such as with ⟨ ä ⟩ , ⟨ ö ⟩ , ⟨ ü ⟩ in German, this is not done; letter-diacritic combinations being identified with their base letter. The same applies to digraphs and trigraphs. Different diacritics may be treated differently in collation within
2231-399: A terminal. Some operating systems such as CP/M tracked file length only in units of disk blocks, and used control-Z to mark the end of the actual text in the file. For these reasons, EOF, or end-of-file , was used colloquially and conventionally as a three-letter acronym for control-Z instead of SUBstitute. The end-of-text character ( ETX ), also known as control-C , was inappropriate for
2328-624: A unified writing system for the Inuit languages in the country. The writing system is based on the Latin alphabet and is modeled after the one used in the Greenlandic language . On 12 February 2021 the government of Uzbekistan announced it will finalize the transition from Cyrillic to Latin for the Uzbek language by 2023. Plans to switch to Latin originally began in 1993 but subsequently stalled and Cyrillic remained in widespread use. At present
2425-449: A variety of reasons, while using control-Z as the control character to end a file is analogous to the letter Z's position at the end of the alphabet, and serves as a very convenient mnemonic aid . A historically common and still prevalent convention uses the ETX character convention to interrupt and halt a program via an input data stream, usually from a keyboard. The Unix terminal driver uses
2522-737: Is 0101 in binary). Many of the non-alphanumeric characters were positioned to correspond to their shifted position on typewriters; an important subtlety is that these were based on mechanical typewriters, not electric typewriters. Mechanical typewriters followed the de facto standard set by the Remington No. 2 (1878), the first typewriter with a shift key, and the shifted values of 23456789- were "#$ %_&'() – early typewriters omitted 0 and 1 , using O (capital letter o ) and l (lowercase letter L ) instead, but 1! and 0) pairs became standard once 0 and 1 became common. Thus, in ASCII !"#$ % were placed in
2619-400: Is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment , and other devices. ASCII has just 128 code points , of which only 95 are printable characters , which severely limit its scope. The set of available punctuation had significant impact on the syntax of computer languages and text markup. ASCII hugely influenced
2716-640: Is also used by the Faroese alphabet . Some West, Central and Southern African languages use a few additional letters that have sound values similar to those of their equivalents in the IPA. For example, Adangme uses the letters ⟨Ɛ ɛ⟩ and ⟨Ɔ ɔ⟩ , and Ga uses ⟨Ɛ ɛ⟩ , ⟨Ŋ ŋ⟩ and ⟨Ɔ ɔ⟩ . Hausa uses ⟨Ɓ ɓ⟩ and ⟨Ɗ ɗ⟩ for implosives , and ⟨Ƙ ƙ⟩ for an ejective . Africanists have standardized these into
2813-476: Is language-dependent, as only the first letter may be capitalized, or all component letters simultaneously (even for words written in title case, where letters after the digraph or trigraph are left in lowercase). A ligature is a fusion of two or more ordinary letters into a new glyph or character. Examples are ⟨ Æ æ⟩ (from ⟨AE⟩ , called ash ), ⟨ Œ œ⟩ (from ⟨OE⟩ , sometimes called oethel or eðel ),
2910-427: Is replaced by a second control-S to resume output. The 33 ASR also could be configured to employ control-R (DC2) and control-T (DC4) to start and stop the tape punch; on some units equipped with this function, the corresponding control character lettering on the keycap above the letter was TAPE and TAPE respectively. The Teletype could not move its typehead backwards, so it did not have a key on its keyboard to send
3007-404: Is the newline problem on various operating systems . Teletype machines required that a line of text be terminated with both "carriage return" (which moves the printhead to the beginning of the line) and "line feed" (which advances the paper one line without moving the printhead). The name "carriage return" comes from the fact that on a manual typewriter the carriage holding the paper moves while
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3104-540: The African reference alphabet . Dotted and dotless I — ⟨İ i⟩ and ⟨I ı⟩ — are two forms of the letter I used by the Turkish , Azerbaijani , and Kazakh alphabets. The Azerbaijani language also has ⟨Ə ə⟩ , which represents the near-open front unrounded vowel . A digraph is a pair of letters used to write one sound or a combination of sounds that does not correspond to
3201-503: The Comité Consultatif International Téléphonique et Télégraphique (CCITT) International Telegraph Alphabet No. 2 (ITA2) standard of 1932, FIELDATA (1956 ), and early EBCDIC (1963), more than 64 codes were required for ASCII. ITA2 was in turn based on Baudot code , the 5-bit telegraph code Émile Baudot invented in 1870 and patented in 1874. The committee debated the possibility of
3298-556: The Crimean Tatar language uses both Cyrillic and Latin. The use of Latin was originally approved by Crimean Tatar representatives after the Soviet Union's collapse but was never implemented by the regional government. After Russia's annexation of Crimea in 2014 the Latin script was dropped entirely. Nevertheless, Crimean Tatars outside of Crimea continue to use Latin and on 22 October 2021 the government of Ukraine approved
3395-563: The English alphabet . Later standards issued by the ISO, for example ISO/IEC 10646 ( Unicode Latin ), have continued to define the 26 × 2 letters of the English alphabet as the basic Latin alphabet with extensions to handle other letters in other languages. The DIN standard DIN 91379 specifies a subset of Unicode letters, special characters, and sequences of letters and diacritic signs to allow
3492-588: The Hadiyya and Kambaata languages. On 15 September 1999 the authorities of Tatarstan , Russia, passed a law to make the Latin script a co-official writing system alongside Cyrillic for the Tatar language by 2011. A year later, however, the Russian government overruled the law and banned Latinization on its territory. In 2015, the government of Kazakhstan announced that a Kazakh Latin alphabet would replace
3589-584: The International Organization for Standardization (ISO). The numeral system is called the Roman numeral system, and the collection of the elements is known as the Roman numerals . The numbers 1, 2, 3 ... are Latin/Roman script numbers for the Hindu–Arabic numeral system . The use of the letters I and V for both consonants and vowels proved inconvenient as the Latin alphabet was adapted to Germanic and Romance languages. W originated as
3686-713: The Iranians , Indonesians , Malays , and Turkic peoples . Most of the rest of Asia used a variety of Brahmic alphabets or the Chinese script . Through European colonization the Latin script has spread to the Americas , Oceania , parts of Asia, Africa, and the Pacific, in forms based on the Spanish , Portuguese , English , French , German and Dutch alphabets. It is used for many Austronesian languages , including
3783-788: The Kazakh Cyrillic alphabet as the official writing system for the Kazakh language by 2025. There are also talks about switching from the Cyrillic script to Latin in Ukraine, Kyrgyzstan , and Mongolia . Mongolia, however, has since opted to revive the Mongolian script instead of switching to Latin. In October 2019, the organization National Representational Organization for Inuit in Canada (ITK) announced that they will introduce
3880-576: The People's Republic of China introduced a script reform to the Zhuang language , changing its orthography from Sawndip , a writing system based on Chinese, to a Latin script alphabet that used a mixture of Latin, Cyrillic, and IPA letters to represent both the phonemes and tones of the Zhuang language, without the use of diacritics. In 1982 this was further standardised to use only Latin script letters. With
3977-636: The Teletype Model 33 , which used the left-shifted layout corresponding to ASCII, differently from traditional mechanical typewriters. Electric typewriters, notably the IBM Selectric (1961), used a somewhat different layout that has become de facto standard on computers – following the IBM PC (1981), especially Model M (1984) – and thus shift values for symbols on modern keyboards do not correspond as closely to
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4074-700: The Turkic -speaking peoples of the former USSR , including Tatars , Bashkirs , Azeri , Kazakh , Kyrgyz and others, had their writing systems replaced by the Latin-based Uniform Turkic alphabet in the 1930s; but, in the 1940s, all were replaced by Cyrillic. After the collapse of the Soviet Union in 1991, three of the newly independent Turkic-speaking republics, Azerbaijan , Uzbekistan , Turkmenistan , as well as Romanian-speaking Moldova , officially adopted Latin alphabets for their languages. Kyrgyzstan , Iranian -speaking Tajikistan , and
4171-730: The United States Federal Government support ASCII, stating: I have also approved recommendations of the Secretary of Commerce [ Luther H. Hodges ] regarding standards for recording the Standard Code for Information Interchange on magnetic tapes and paper tapes when they are used in computer operations. All computers and related equipment configurations brought into the Federal Government inventory on and after July 1, 1969, must have
4268-399: The abbreviation ⟨ & ⟩ (from Latin : et , lit. 'and', called ampersand ), and ⟨ ẞ ß ⟩ (from ⟨ſʒ⟩ or ⟨ſs⟩ , the archaic medial form of ⟨s⟩ , followed by an ⟨ ʒ ⟩ or ⟨s⟩ , called sharp S or eszett ). A diacritic, in some cases also called an accent, is
4365-667: The carriage return , line feed , and tab codes. For example, lowercase i would be represented in the ASCII encoding by binary 1101001 = hexadecimal 69 ( i is the ninth letter) = decimal 105. Despite being an American standard, ASCII does not have a code point for the cent (¢). It also does not support English terms with diacritical marks such as résumé and jalapeño , or proper nouns with diacritical marks such as Beyoncé (although on certain devices characters could be combined with punctuation such as Tilde (~) and Backtick (`) to approximate such characters.) The American Standard Code for Information Interchange (ASCII)
4462-708: The languages of the Philippines and the Malaysian and Indonesian languages , replacing earlier Arabic and indigenous Brahmic alphabets. Latin letters served as the basis for the forms of the Cherokee syllabary developed by Sequoyah ; however, the sound values are completely different. Under Portuguese missionary influence, a Latin alphabet was devised for the Vietnamese language , which had previously used Chinese characters . The Latin-based alphabet replaced
4559-645: The "Reset to Initial State", "RIS" command " ESC c ". In contrast, an ESC read from the terminal is most often used as an out-of-band character used to terminate an operation or special mode, as in the TECO and vi text editors . In graphical user interface (GUI) and windowing systems, ESC generally causes an application to abort its current operation or to exit (terminate) altogether. The inherent ambiguity of many control characters, combined with their historical usage, created problems when transferring "plain text" files between systems. The best example of this
4656-582: The "help" prefix command in GNU Emacs . Many more of the control characters have been assigned meanings quite different from their original ones. The "escape" character (ESC, code 27), for example, was intended originally to allow sending of other control characters as literals instead of invoking their meaning, an "escape sequence". This is the same meaning of "escape" encountered in URL encodings, C language strings, and other systems where certain characters have
4753-401: The "line feed" function (which causes a printer to advance its paper), and character 8 represents " backspace ". RFC 2822 refers to control characters that do not include carriage return, line feed or white space as non-whitespace control characters. Except for the control characters that prescribe elementary line-oriented formatting, ASCII does not define any mechanism for describing
4850-407: The 16th century, while a new, pointed minuscule v was derived from V for the consonant. In the case of I, a word-final swash form, j , came to be used for the consonant, with the un-swashed form restricted to vowel use. Such conventions were erratic for centuries. J was introduced into English for the consonant in the 17th century (it had been rare as a vowel), but it was not universally considered
4947-665: The 18th century had frequently all nouns capitalized, in the same way that Modern German is written today, e.g. German : Alle Schwestern der alten Stadt hatten die Vögel gesehen , lit. 'All of the Sisters of the old City had seen the Birds';. Words from languages natively written with other scripts , such as Arabic or Chinese , are usually transliterated or transcribed when embedded in Latin-script text or in multilingual international communication,
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#17327654072765044-472: The 26 most widespread letters are the letters contained in the ISO basic Latin alphabet , which are the same letters as the English alphabet . Latin script is the basis for the largest number of alphabets of any writing system and is the most widely adopted writing system in the world. Latin script is used as the standard method of writing the languages of Western and Central Europe, most of sub-Saharan Africa,
5141-709: The 26 × 2 letters of the English alphabet as the basic Latin alphabet with extensions to handle other letters in other languages. The Latin alphabet spread, along with Latin , from the Italian Peninsula to the lands surrounding the Mediterranean Sea with the expansion of the Roman Empire . The eastern half of the Empire, including Greece, Turkey, the Levant , and Egypt, continued to use Greek as
5238-419: The ASCII chart in this article. Ninety-five of the encoded characters are printable: these include the digits 0 to 9 , lowercase letters a to z , uppercase letters A to Z , and punctuation symbols . In addition, the original ASCII specification included 33 non-printing control codes which originated with Teletype models ; most of these are now obsolete, although a few are still commonly used, such as
5335-679: The ASCII table as earlier keyboards did. The /? pair also dates to the No. 2, and the ,< .> pairs were used on some keyboards (others, including the No. 2, did not shift , (comma) or . (full stop) so they could be used in uppercase without unshifting). However, ASCII split the ;: pair (dating to No. 2), and rearranged mathematical symbols (varied conventions, commonly -* =+ ) to :* ;+ -= . Some then-common typewriter characters were not included, notably ½ ¼ ¢ , while ^ ` ~ were included as diacritics for international use, and < > for mathematical use, together with
5432-458: The Americas, and Oceania, as well as many languages in other parts of the world. The script is either called Latin script or Roman script, in reference to its origin in ancient Rome (though some of the capital letters are Greek in origin). In the context of transliteration , the term " romanization " ( British English : "romanisation") is often found. Unicode uses the term "Latin" as does
5529-666: The Chinese characters in administration in the 19th century with French rule. In the late 19th century, the Romanians switched to using the Latin alphabet, dropping the Romanian Cyrillic alphabet . Romanian is one of the Romance languages . In 1928, as part of Mustafa Kemal Atatürk 's reforms, the new Republic of Turkey adopted a Latin alphabet for the Turkish language , replacing a modified Arabic alphabet. Most of
5626-470: The DEL character was assigned to erase the previous character. Because of this, DEC video terminals (by default) sent the DEL character for the key marked "Backspace" while the separate key marked "Delete" sent an escape sequence ; many other competing terminals sent a BS character for the backspace key. The early Unix tty drivers, unlike some modern implementations, allowed only one character to be set to erase
5723-497: The Latin alphabet in their ( ISO/IEC 646 ) standard. To achieve widespread acceptance, this encapsulation was based on popular usage. As the United States held a preeminent position in both industries during the 1960s, the standard was based on the already published American Standard Code for Information Interchange , better known as ASCII , which included in the character set the 26 × 2 (uppercase and lowercase) letters of
5820-719: The Law on Official Use of the Language and Alphabet. As late as 1500, the Latin script was limited primarily to the languages spoken in Western , Northern , and Central Europe . The Orthodox Christian Slavs of Eastern and Southeastern Europe mostly used Cyrillic , and the Greek alphabet was in use by Greek speakers around the eastern Mediterranean. The Arabic script was widespread within Islam, both among Arabs and non-Arab nations like
5917-405: The Teletype Model 33 machine assignments for codes 17 (control-Q, DC1, also known as XON), 19 (control-S, DC3, also known as XOFF), and 127 ( delete ) became de facto standards. The Model 33 was also notable for taking the description of control-G (code 7, BEL, meaning audibly alert the operator) literally, as the unit contained an actual bell which it rang when it received a BEL character. Because
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#17327654072766014-473: The Teletype Model 35 as a seven- bit teleprinter code promoted by Bell data services. Work on the ASCII standard began in May 1961, with the first meeting of the American Standards Association's (ASA) (now the American National Standards Institute or ANSI) X3.2 subcommittee. The first edition of the standard was published in 1963, underwent a major revision during 1967, and experienced its most recent update during 1986. Compared to earlier telegraph codes,
6111-435: The alphabet of Old English . Another Irish letter, the insular g , developed into yogh ⟨Ȝ ȝ⟩ , used in Middle English . Wynn was later replaced with the new letter ⟨w⟩ , eth and thorn with ⟨ th ⟩ , and yogh with ⟨ gh ⟩ . Although the four are no longer part of the English or Irish alphabets, eth and thorn are still used in the modern Icelandic alphabet , while eth
6208-460: The appearance of a ligature ⟨ij⟩ very similar to the letter ⟨ÿ⟩ in handwriting . A trigraph is made up of three letters, like the German ⟨ sch ⟩ , the Breton ⟨ c'h ⟩ or the Milanese ⟨oeu⟩ . In the orthographies of some languages, digraphs and trigraphs are regarded as independent letters of the alphabet in their own right. The capitalization of digraphs and trigraphs
6305-427: The breakaway region of Transnistria kept the Cyrillic alphabet, chiefly due to their close ties with Russia. In the 1930s and 1940s, the majority of Kurds replaced the Arabic script with two Latin alphabets. Although only the official Kurdish government uses an Arabic alphabet for public documents, the Latin Kurdish alphabet remains widely used throughout the region by the majority of Kurdish -speakers. In 1957,
6402-585: The change into its draft standard. The X3.2.4 task group voted its approval for the change to ASCII at its May 1963 meeting. Locating the lowercase letters in sticks 6 and 7 caused the characters to differ in bit pattern from the upper case by a single bit, which simplified case-insensitive character matching and the construction of keyboards and printers. The X3 committee made other changes, including other new characters (the brace and vertical bar characters), renaming some control characters (SOM became start of header (SOH)) and moving or removing others (RU
6499-405: The collapse of the Derg and subsequent end of decades of Amharic assimilation in 1991, various ethnic groups in Ethiopia dropped the Geʽez script , which was deemed unsuitable for languages outside of the Semitic branch . In the following years the Kafa , Oromo , Sidama , Somali , and Wolaitta languages switched to Latin while there is continued debate on whether to follow suit for
6596-493: The concept of "carriage return" was meaningless. IBM's PC DOS (also marketed as MS-DOS by Microsoft) inherited the convention by virtue of being loosely based on CP/M, and Windows in turn inherited it from MS-DOS. Requiring two characters to mark the end of a line introduces unnecessary complexity and ambiguity as to how to interpret each character when encountered by itself. To simplify matters, plain text data streams, including files, on Multics used line feed (LF) alone as
6693-478: The convention was so well established that backward compatibility necessitated continuing to follow it. When Gary Kildall created CP/M , he was inspired by some of the command line interface conventions used in DEC's RT-11 operating system. Until the introduction of PC DOS in 1981, IBM had no influence in this because their 1970s operating systems used EBCDIC encoding instead of ASCII, and they were oriented toward punch-card input and line printer output on which
6790-531: The correct representation of names and to simplify data exchange in Europe. This specification supports all official languages of European Union and European Free Trade Association countries (thus also the Greek and Cyrillic scripts), plus the German minority languages . To allow the transliteration of names in other writing systems to the Latin script according to the relevant ISO standards all necessary combinations of base letters and diacritic signs are provided. Efforts are being made to further develop it into
6887-426: The design of character sets used by modern computers, including Unicode which has over a million code points, but the first 128 of these are the same as ASCII. The Internet Assigned Numbers Authority (IANA) prefers the name US-ASCII for this character encoding. ASCII is one of the IEEE milestones . ASCII was developed in part from telegraph code . Its first commercial use was in the Teletype Model 33 and
6984-663: The earlier five-bit ITA2 , which was also used by the competing Telex teleprinter system. Bob Bemer introduced features such as the escape sequence . His British colleague Hugh McGregor Ross helped to popularize this work – according to Bemer, "so much so that the code that was to become ASCII was first called the Bemer–Ross Code in Europe". Because of his extensive work on ASCII, Bemer has been called "the father of ASCII". On March 11, 1968, US President Lyndon B. Johnson mandated that all computers purchased by
7081-576: The earlier teleprinter encoding systems. Like other character encodings , ASCII specifies a correspondence between digital bit patterns and character symbols (i.e. graphemes and control characters ). This allows digital devices to communicate with each other and to process, store, and communicate character-oriented information such as written language. Before ASCII was developed, the encodings in use included 26 alphabetic characters, 10 numerical digits , and from 11 to 25 special graphic symbols. To include all these, and control characters compatible with
7178-548: The end-of-transmission character ( EOT ), also known as control-D, to indicate the end of a data stream. In the C programming language , and in Unix conventions, the null character is used to terminate text strings ; such null-terminated strings can be known in abbreviation as ASCIZ or ASCIIZ, where here Z stands for "zero". Other representations might be used by specialist equipment, for example ISO 2047 graphics or hexadecimal numbers. Codes 20 hex to 7E hex , known as
7275-579: The first 32 code points (numbers 0–31 decimal) and the last one (number 127 decimal) for control characters . These are codes intended to control peripheral devices (such as printers ), or to provide meta-information about data streams, such as those stored on magnetic tape. Despite their name, these code points do not represent printable characters (i.e. they are not characters at all, but signals). For debugging purposes, "placeholder" symbols (such as those given in ISO 2047 and its predecessors) are assigned to them. For example, character 0x0A represents
7372-448: The keytop for the O key also showed a left-arrow symbol (from ASCII-1963, which had this character instead of underscore ), a noncompliant use of code 15 (control-O, shift in) interpreted as "delete previous character" was also adopted by many early timesharing systems but eventually became neglected. When a Teletype 33 ASR equipped with the automatic paper tape reader received a control-S (XOFF, an abbreviation for transmit off), it caused
7469-800: The local conventions and the NVT. The File Transfer Protocol adopted the Telnet protocol, including use of the Network Virtual Terminal, for use when transmitting commands and transferring data in the default ASCII mode. This adds complexity to implementations of those protocols, and to other network protocols, such as those used for E-mail and the World Wide Web, on systems not using the NVT's CR-LF line-ending convention. The PDP-6 monitor, and its PDP-10 successor TOPS-10, used control-Z (SUB) as an end-of-file indication for input from
7566-452: The previous character in canonical input processing (where a very simple line editor is available); this could be set to BS or DEL, but not both, resulting in recurring situations of ambiguity where users had to decide depending on what terminal they were using ( shells that allow line editing, such as ksh , bash , and zsh , understand both). The assumption that no key sent a BS character allowed Ctrl+H to be used for other purposes, such as
7663-515: The previous section. Code 7F hex corresponds to the non-printable "delete" (DEL) control character and is therefore omitted from this chart; it is covered in the previous section's chart. Earlier versions of ASCII used the up arrow instead of the caret (5E hex ) and the left arrow instead of the underscore (5F hex ). ASCII was first used commercially during 1963 as a seven-bit teleprinter code for American Telephone & Telegraph 's TWX (TeletypeWriter eXchange) network. TWX originally used
7760-413: The printable characters, represent letters, digits, punctuation marks , and a few miscellaneous symbols. There are 95 printable characters in total. Code 20 hex , the "space" character, denotes the space between words, as produced by the space bar of a keyboard. Since the space character is considered an invisible graphic (rather than a control character) it is listed in the table below instead of in
7857-444: The proposed Bell code and ASCII were both ordered for more convenient sorting (i.e., alphabetization) of lists and added features for devices other than teleprinters. The use of ASCII format for Network Interchange was described in 1969. That document was formally elevated to an Internet Standard in 2015. Originally based on the (modern) English alphabet , ASCII encodes 128 specified characters into seven-bit integers as shown by
7954-522: The same reason, many special signs commonly used as separators were placed before digits. The committee decided it was important to support uppercase 64-character alphabets , and chose to pattern ASCII so it could be reduced easily to a usable 64-character set of graphic codes, as was done in the DEC SIXBIT code (1963). Lowercase letters were therefore not interleaved with uppercase . To keep options available for lowercase letters and other graphics,
8051-494: The second stick, positions 1–5, corresponding to the digits 1–5 in the adjacent stick. The parentheses could not correspond to 9 and 0 , however, because the place corresponding to 0 was taken by the space character. This was accommodated by removing _ (underscore) from 6 and shifting the remaining characters, which corresponded to many European typewriters that placed the parentheses with 8 and 9 . This discrepancy from typewriters led to bit-paired keyboards , notably
8148-538: The simple line characters \ | (in addition to common / ). The @ symbol was not used in continental Europe and the committee expected it would be replaced by an accented À in the French variation, so the @ was placed in position 40 hex , right before the letter A. The control codes felt essential for data transmission were the start of message (SOM), end of address (EOA), end of message (EOM), end of transmission (EOT), "who are you?" (WRU), "are you?" (RU),
8245-567: The speakers of several Uralic languages , most notably Hungarian , Finnish and Estonian . The Latin script also came into use for writing the West Slavic languages and several South Slavic languages , as the people who spoke them adopted Roman Catholicism . The speakers of East Slavic languages generally adopted Cyrillic along with Orthodox Christianity . The Serbian language uses both scripts, with Cyrillic predominating in official communication and Latin elsewhere, as determined by
8342-402: The special and numeric codes were arranged before the letters, and the letter A was placed in position 41 hex to match the draft of the corresponding British standard. The digits 0–9 are prefixed with 011, but the remaining 4 bits correspond to their respective values in binary, making conversion with binary-coded decimal straightforward (for example, 5 in encoded to 011 0101 , where 5
8439-425: The standard is unclear about the meaning of "delete". Probably the most influential single device affecting the interpretation of these characters was the Teletype Model 33 ASR, which was a printing terminal with an available paper tape reader/punch option. Paper tape was a very popular medium for long-term program storage until the 1980s, less costly and in some ways less fragile than magnetic tape. In particular,
8536-496: The start of a new syllable, or distinguish between homographs such as the Dutch words een ( pronounced [ən] ) meaning "a" or "an", and één , ( pronounced [e:n] ) meaning "one". As with the pronunciation of letters, the effect of diacritics is language-dependent. English is the only major modern European language that requires no diacritics for its native vocabulary . Historically, in formal writing,
8633-440: The structure or appearance of text within a document. Other schemes, such as markup languages , address page and document layout and formatting. The original ASCII standard used only short descriptive phrases for each control character. The ambiguity this caused was sometimes intentional, for example where a character would be used slightly differently on a terminal link than on a data stream , and sometimes accidental, for example
8730-441: The tape reader to stop; receiving control-Q (XON, transmit on) caused the tape reader to resume. This so-called flow control technique became adopted by several early computer operating systems as a "handshaking" signal warning a sender to stop transmission because of impending buffer overflow ; it persists to this day in many systems as a manual output control technique. On some systems, control-S retains its meaning, but control-Q
8827-600: The time could record eight bits in one position, it also allowed for a parity bit for error checking if desired. Eight-bit machines (with octets as the native data type) that did not use parity checking typically set the eighth bit to 0. The code itself was patterned so that most control codes were together and all graphic codes were together, for ease of identification. The first two so-called ASCII sticks (32 positions) were reserved for control characters. The "space" character had to come before graphics to make sorting easier, so it became position 20 hex ; for
8924-447: The typebars that strike the ribbon remain stationary. The entire carriage had to be pushed (returned) to the right in order to position the paper for the next line. DEC operating systems ( OS/8 , RT-11 , RSX-11 , RSTS , TOPS-10 , etc.) used both characters to mark the end of a line so that the console device (originally Teletype machines) would work. By the time so-called "glass TTYs" (later called CRTs or "dumb terminals") came along,
9021-527: The written letters in sequence. Examples are ⟨ ch ⟩ , ⟨ ng ⟩ , ⟨ rh ⟩ , ⟨ sh ⟩ , ⟨ ph ⟩ , ⟨ th ⟩ in English, and ⟨ ij ⟩ , ⟨ee⟩ , ⟨ ch ⟩ and ⟨ei⟩ in Dutch. In Dutch the ⟨ij⟩ is capitalized as ⟨IJ⟩ or the ligature ⟨IJ⟩ , but never as ⟨Ij⟩ , and it often takes
9118-456: Was based on popular usage. As the United States held a preeminent position in both industries during the 1960s, the standard was based on the already published American Standard Code for Information Interchange , better known as ASCII , which included in the character set the 26 × 2 (uppercase and lowercase) letters of the English alphabet . Later standards issued by the ISO, for example ISO/IEC 10646 ( Unicode Latin ), have continued to define
9215-678: Was developed under the auspices of a committee of the American Standards Association (ASA), called the X3 committee, by its X3.2 (later X3L2) subcommittee, and later by that subcommittee's X3.2.4 working group (now INCITS ). The ASA later became the United States of America Standards Institute (USASI) and ultimately became the American National Standards Institute (ANSI). With the other special characters and control codes filled in, ASCII
9312-695: Was published as ASA X3.4-1963, leaving 28 code positions without any assigned meaning, reserved for future standardization, and one unassigned control code. There was some debate at the time whether there should be more control characters rather than the lowercase alphabet. The indecision did not last long: during May 1963 the CCITT Working Party on the New Telegraph Alphabet proposed to assign lowercase characters to sticks 6 and 7, and International Organization for Standardization TC 97 SC 2 voted during October to incorporate
9409-450: Was removed). ASCII was subsequently updated as USAS X3.4-1967, then USAS X3.4-1968, ANSI X3.4-1977, and finally, ANSI X3.4-1986. In the X3.15 standard, the X3 committee also addressed how ASCII should be transmitted ( least significant bit first) and recorded on perforated tape. They proposed a 9-track standard for magnetic tape and attempted to deal with some punched card formats. The X3.2 subcommittee designed ASCII based on
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