Terms: Ontologies (3,070,000), ontology (7,380,000), ontological (2,970,000), ontologist (52,800), ontologists (47,800),
Terms: taxonomy (24,800,000), taxonomy browser (236,000), taxonomic (7,240,000), taxonomy statistics (163), NCBI taxonomy (140,000),
National Center for Biotechnology Information
Terms: calendar (1,360,000,000), thesaurus (63,500,000), dictionary (233,000,000), directory (2,050,000,000), list (3,450,000,000), table (747,000,000), index (1,720,000,000), database (708,000,000), dbms (2,990,000),
Boolean: owl +ontology (970,000),
Terms: web ontology language (233,000), namespace (14,100,000), namespaces (5,290,000), resource description framework (556,000),
Terms: web quality (361,000), web standards (23,600,000),
Terms: contemporary ontologies (67), the class of all (192,000), set of (307,000,000), class of (79,100,000), group of (320,000,000), hierarchy of (7,920,000), a set of (108,000,000), a class of (11,900,000), a group of (151,000,000),
Terms: ontology tools (5,360), ontology resources (645), ontology sites (83), ontology software (1,430), ontology professionals (5),
Terms: biomedical ontology (22,700), applied ontology (38,700), ontology project (59,800), ontological engineering (59,600),
Terms: cyc foundation (553), opencyc (118,000), wordnet (5,150,000),
The Cyc Foundation - Conventional classification system
Princeton University Cognitive Science Laboratory - WordNet
Terms: subject headings (4,240,000), classification system (5,120,000), classification (96,500,000),
Terms: semantic web (8,480,000), artificial intelligence (20,000,000), semantic reasoning (2,660), semantic (22,500,000),
Terms: ontology computer (840), ontology language (292,000), ontology languages (76,300), ontology libraries (532), ontology models (1,640), ontology designer (418), ontology inference (2,960), ontology editor (66,900), ontology dbms (26), ontology warehouse (43), ontology philosophy (2,220), ontology gene (950), ontology programs (58), ontology library (3,820), ontology alignment (45,000), ontology learning (66,700), ontology page (572), ontology portal (796), ontology site (411), ontology class (1,960), ontology research (6,510), ontology based (450,000), ontology science (334), ontology article (115),
Terms: domain ontology (112,000), domain ontologies (98,800),
Terms: ontologism (926),