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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

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+{{Wiktionary|trigraph}}
-A '''trigraph''' (from the Greek words tria = three and grapho = write) is a group of three symbols, most commonly letters.
+'''Trigraph''' may refer to:
+{{TOC right}}
+*[[Trigraph (orthography)]], a combination of written letters used to represent a sound
-Trigraphs are used in several fields, and for several purposes. Among them are
+==Computing==
-* In computing:
+* [[Digraphs and trigraphs (programming)]], a group of characters used to symbolise one character
-* [[Trigraph_(computing)]] Trigraphs in Computing
-** A [[C trigraph]], a character representation in the [[C (programming language)|C]] family of programming languages.
+*An octal or decimal representation of [[byte]] values
+*Mnemonics for [[machine language]] instructions
-** As [[octal]] or [[decimal]] representation of [[byte]] values.
+*As language codes in [[ISO 639]]
-** [[Mnemonic]]s for [[machine language]] instructions.
-** There are text matching and data compression algorithms which act directly on trigraphs.
-* In language:
-** As language codes in [[ISO 639]].
-** A [[Trigraph (orthography)]], a sound representation in [[orthography]].
-** As [[abbreviation]]s.
-* In [[cryptography]]:
-** As substitution group in a [[substitution cipher]].
-* As combinations in the [[Ling Qi Jing]].
-* In [[mathematics]]:
-** As a generalization of [[Graph_(mathematics)|graphs]].
+==Cryptography==
-''Trigraph'' is also the name of several businesses.
+*As substitution group in a [[substitution cipher]]
+*As combinations in the [[Ling Qi Jing]]
+==Mathematics==
-{{disambig}}
+*As a generalization of [[Graph (discrete mathematics)|graph]]s where there is a set of edges called ''semi-adjacent''
+==See also==
+*[[Digraph (disambiguation)]]
+*[[Tetragraph]]
+*[[Multigraph (disambiguation)]]
+{{Disambiguation}}