Thesauri (information retrieval)

controlled vocabulary for the purpose of indexing journal articles and books in the life sciences

thesaurus of artists and people by the Getty Research Institute

lexical unit of a thesaurus (word or phrase) used for indexing and that captures the essence of the topic of a document

AGROVOC is a multilingual controlled vocabulary covering areas of interest of the Food and Agriculture Organization of the United Nations (FAO), aiming to promote the visibility of research produced among FAO members. By March 2024, AGROVOC consisted of over 42 000 concepts and up to 1 000 000 terms in more than 42 different languages. It is a collaborative effort, the outcome of consensus among a community of experts coordinated by FAO.

thumb|right|Logo EuroVoc is a multilingual thesaurus (controlled vocabulary) maintained by the Publications Office of the European Union and hosted on the portal Europa. It exists in the 24 official languages of the European Union (Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Irish, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovene, Spanish and Swedish) plus Albanian, Macedonian and Serbian, although the user interface is not yet available in these languages.

controlled vocabulary expanded with relations of broader, narrower and related terms, serving subject indexing and vocabulary control

thesaurus realised and run by National Central Library of Florence

thesaurus for describing items of art, architecture, and material culture

thesaurus of geographic names by the Getty Research Institute

simplified syntax for Library of Congress Subject Headings

controlled vocabulary of bibliographic subject headings

Lexipedia is an online visual semantic network with dictionary and thesaurus reference functionality built on Vantage Learning's Multilingual ConceptNet. Lexipedia presents words with their semantic relationships displayed in an animated visual word web. Lexipedia contains an expanded version of the English Wordnet and supports six languages; English, Dutch, French, German, Italian, Spanish languages.