Digraph

Digraph, often misspelled as diagraph, may refer to:


 * Digraph (orthography), a pair of characters used together to represent a single sound, such as "sh" in English
 * 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