In संगणक विज्ञान, where it is considered as an application of mathematical logic, semantics reflects the meaning of programs or functions.

In this regard, semantics permits programs to be separated into their syntactical part (grammatical structure) and their semantic part (meaning). For instance, the following statements use different syntaxes, but issue the same instructions:
Generally these operations would all perform an arithmetical addition of 'y' to 'x' and store the result in a variable called 'x'.

Semantics for computer applications falls into three categories:

The Semantic Web refers to the extension of the World Wide Web through the embedding of additional semantic metadata; s.a. Web Ontology Language (OWL).

मानसशास्त्र Psychology
Prototype theory प्रतिकृती सिद्धांत
भाषाशास्त्र Linguistics
संगणक विज्ञान