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Trigraph (orthography), Trigraphs
Trigraph may refer to: *Trigraph (orthography), a combination of written letters used to represent a sound Computing * Digraphs and trigraphs (programming), a group of characters used to symbolise one character *An octal or decimal representation of byte values *Mnemonics for machine language instructions *As language codes in ISO 639 Cryptography *As substitution group in a substitution cipher *As combinations in the Ling Qi Jing Mathematics *As a generalization of graphs where there is a set of edges called ''semi-adjacent'' See also * Digraph (other) *Tetragraph A tetragraph, , is a sequence of four letters used to represent a single sound (phoneme), or a combination of sounds, that do not necessarily correspond to the individual values of the letters. In German, for example, the tetragraph ''tsch'' repre ... * Multigraph (other) {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trigraph (orthography)
A trigraph () is a group of three characters used to represent a single sound or a combination of sounds that does not correspond to the written letters combined. Latin-script trigraphs For example, in the word ''Austrian schilling, schilling'', the trigraph ''sch'' represents the voiceless postalveolar fricative , rather than the consonant cluster . In the word ''beautiful,'' the sequence ''eau'' is pronounced , and in the French language, French word ''château'' it is pronounced . It is sometimes difficult to determine whether a sequence of letters in English is a trigraph, because of the complicating role of silent letters. There are however a few productive trigraphs in English such as ''tch'' as in ''watch,'' and ''igh'' as in ''high.'' The trigraph ''sch'' in German language, German is equivalent to the English ''sh'' and pronounced . In Dutch language, Dutch, which is closely related to German, this same trigraph is pronounced . In Italian language, Italian, however, ''sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digraphs And Trigraphs (programming)
In computer programming, digraphs and trigraphs are sequences of two and three characters, respectively, that appear in source code and, according to a programming language's specification, should be treated as if they were single characters. Various reasons exist for using digraphs and trigraphs: keyboards may not have keys to cover the entire character set of the language, input of special characters may be difficult, text editors may reserve some characters for special use and so on. Trigraphs might also be used for some EBCDIC code pages that lack characters such as . History The basic character set of the C programming language is a subset of the ASCII character set that includes nine characters which lie outside the ISO 646 invariant character set. This can pose a problem for writing source code when the encoding (and possibly keyboard) being used does not support one or more of these nine characters. The ANSI C committee invented trigraphs as a way of entering sourc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byte
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures. To disambiguate arbitrarily sized bytes from the common 8-bit definition, network protocol documents such as the Internet Protocol () refer to an 8-bit byte as an octet. Those bits in an octet are usually counted with numbering from 0 to 7 or 7 to 0 depending on the bit endianness. The size of the byte has historically been hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used. The six-bit character code was an often-used implementation in early encoding systems, and computers using six-bit and nine-bit bytes were common in the 1960s. These systems often had memory words of 12, 18, 24, 30, 36, 48, or 60 bits, corresponding t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine Language
In computer programming, machine code is computer code consisting of machine language instructions, which are used to control a computer's central processing unit (CPU). For conventional binary computers, machine code is the binaryOn nonbinary machines it is, e.g., a decimal representation. representation of a computer program that is actually read and interpreted by the computer. A program in machine code consists of a sequence of machine instructions (possibly interspersed with data). Each machine code instruction causes the CPU to perform a specific task. Examples of such tasks include: # Load a word from memory to a CPU register # Execute an arithmetic logic unit (ALU) operation on one or more registers or memory locations # Jump or skip to an instruction that is not the next one In general, each architecture family (e.g., x86, ARM) has its own instruction set architecture (ISA), and hence its own specific machine code language. There are exceptions, such as the V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISO 639
ISO 639 is a international standard, standard by the International Organization for Standardization (ISO) concerned with representation of languages and language groups. It currently consists of four sets (1-3, 5) of code, named after each part which formerly described respective set (part 4 was guidelines without its own coding system); a part 6 was published but withdrawn. It was first approved in 1967 as a single-part ISO Recommendation, ISO/R 639, superseded in 2002 by part 1 of the new series, ISO 639-1, followed by additional parts. All existing parts of the series were consolidated into a single standard in 2023, largely based on the text of ISO 639-4. Use of ISO 639 codes The language codes defined in the several sections of ISO 639 are used for bibliographic purposes and, in computing and internet environments, as a key element of Locale (computer software), locale data. The codes also find use in various applications, such as Wikipedia URLs for its different language edi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Substitution Cipher
In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing the inverse substitution process to extract the original message. Substitution ciphers can be compared with transposition ciphers. In a transposition cipher, the units of the plaintext are rearranged in a different and usually quite complex order, but the units themselves are left unchanged. By contrast, in a substitution cipher, the units of the plaintext are retained in the same sequence in the ciphertext, but the units themselves are altered. There are a number of different types of substitution cipher. If the cipher operates on single letters, it is termed a simple substitution cipher; a cipher that operates on larger groups of lett ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ling Qi Jing
''Lingqijing'' (or ''Ling Ch'i Ching''; 靈棋經 lit. "Classic of the Divine Chess") is a Chinese book of divination. It is not known when, nor by whom, it was written, though a legend has spread that strategist Zhang Liang received the book from Huang Shigong (黃石公), a semi-mythological figure in Chinese history. The first commented edition of the work appeared in the Jin Dynasty. As its name suggests, the work concerns "divining" with tokens, such as Chinese chess (''xiangqi'' i.e.象棋) pieces (instead of with the more traditional turtle shells or yarrow stalks used in ''I Ching'' divination). Twelve Xiangqi pieces are used; each piece is a disc with a character on one side, and the other side unmarked. Four have the character for "up" (, pronounced ''shang''), four have the character for "middle" (, ''zhong''), and four have the character for "down" (, ''xia''), representing respectively the Three Realms: Heaven (, ''tian''), Humanity (, ''ren''), and Earth (, ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graph (discrete Mathematics)
In discrete mathematics, particularly in graph theory, a graph is a structure consisting of a Set (mathematics), set of objects where some pairs of the objects are in some sense "related". The objects are represented by abstractions called ''Vertex (graph theory), vertices'' (also called ''nodes'' or ''points'') and each of the related pairs of vertices is called an ''edge'' (also called ''link'' or ''line''). Typically, a graph is depicted in diagrammatic form as a set of dots or circles for the vertices, joined by lines or curves for the edges. The edges may be directed or undirected. For example, if the vertices represent people at a party, and there is an edge between two people if they shake hands, then this graph is undirected because any person ''A'' can shake hands with a person ''B'' only if ''B'' also shakes hands with ''A''. In contrast, if an edge from a person ''A'' to a person ''B'' means that ''A'' owes money to ''B'', then this graph is directed, because owing mon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digraph (other)
Digraph, often misspelled as diagraph, may refer to: * Digraph (orthography), a pair of characters used together to represent a single sound, such as "nq" in Hmong RPA * Ligature (writing), the joining of two letters as a single glyph, such as "æ" * Digraph (computing), a group of two characters in computer source code to be treated as a single character * A directed graph, in graph theory * Digraph, a component of a CIA cryptonym, a covert code name * Digraph, a two-letter ISO 639-1 language code See also * Digraphia, use of multiple complete writing systems for one language. * Digram (other) / Digramme * Bigram A bigram or digram is a sequence of two adjacent elements from a string of tokens, which are typically letters, syllables, or words. A bigram is an ''n''-gram for ''n''=2. The frequency distribution of every bigram in a string is commonly used f ... * Trigraph (other) * Multigraph (other) * Unigraph * wikt:Diagraph, a combination ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetragraph
A tetragraph, , is a sequence of four letters used to represent a single sound (phoneme), or a combination of sounds, that do not necessarily correspond to the individual values of the letters. In German, for example, the tetragraph ''tsch'' represents the sound of the English digraph ''ch''. English does not have tetragraphs in native words (the closest is perhaps the sequence '' -ough'' in words like ''through''), but ''chth'' and ''phth'' are true tetragraphs when found initially in words of Greek origin such as '' chthonic'' and '' phthisis''. Phonemes spelled with multiple characters often indicate that either the phoneme or the script is alien to the language. For example, the Cyrillic alphabets adapted to the Caucasian languages, which are phonologically very different from Russian, make extensive use of digraphs, trigraphs, and even a tetragraph in Kabardian for . The Romanized Popular Alphabet created for the Hmong languages includes three tetragraphs: ''nplh, ntsh,' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
