Applied Science Covering the field of Applied science which is the use of the scientific method and knowledge obtained via conclusions from the method to attain practical goals. It includes a broad range of disciplines such as Applied Physics, Applied Mathematics, Architectural Science, General engineering, Automotive engineering, Biological engineering, Biochemical engineering, Chemical engineering. 6,961
Astronomy The Unified Astronomy thesaurus is an open source project created as a joint venture between the American Institute of Physics and the Institute of Physics for the American Astronomical Society. 1,921
Behavioral Science Covers behavioral sciences and psychology and touching on criminology, economics, and ethics. 4,144
Biological Science General biological sciences: zoology, botany, agriculture, the environment, husbandry, paleontology, etc. 8,837
Chemical – MAI Chem™ This application for data mining to provide valid chemical names, popular names, brand names and their variations. In addition to the large dictionary of terms included, there are four types of special algorithms added to the basic M.A.I. system for the semantic determination and extraction of chemical names. Currently this system is being used to identify chemical and pharmaceutical topics in patents and full text literature.  
Computer Science Covering computer science topics such as software and software systems. It involves working with mathematical models, data analysis and security, algorithms, and computational theory. 167
DTIC – Defense Technical Information Center The Defense Technical Information Center thesaurus is used to index the DTIC Technical Reports Collection on Public STINET indexes research reports generated for and by the Department of Defense. 14,377
Environment – GEMET This thesaurus covers the full range of environmental topics and associated regulatory concepts from a European perspective. 5,298
Geography Thesaurus for cartographic, physical, and human geography.  The place names sections include natural land forms, states, countries, provinces, counties, cities, rivers, mountain ranges, bodies of water and other names.   29,541
JSTOR General coverage of the humanities and science, often used instead of Library of Congress Subject Headings for large collections. 48,966
Kew Medicinal Plant Names (MPNS) Developed in partnership with the Royal Botanical Gardens at Kew. Includes an average of 16.7 synonyms per plant name and suggests the Kew approved genus and species name to the author/researcher. 42,761
Mathematics Covering the field of both pure and applied mathematics. Algebra, geometry, calculus, number theory, statistics, coding theory, trigonometry, discrete math, etc.  1,816
NASA The NASA knowledge domain contains the authorized subject terms by which the documents in the NASA Aeronautics and Space Database are indexed and retrieved. 18,460
National Agricultural Library Covering the field of agriculture and related activities, this broad thesaurus is highly regarded work from the US National Agricultural Library. 135,000
Physical Sciences Covers general topic including chemistry, physics, engineering, geology, astronomy and environmental science. 8,680
PLOS The Public Library of Science is an open access publisher of broad science coverage especially for biology and genes. 11,082
Science A General Science taxonomy covering the four major areas in science—energy and matter, the living world, planet earth, and space. Students thus become acquainted with the basic ideas upon which a number of sciences are built, including Measurement, the scientific method, Physics, Chemistry, Biology, Earth Science and Astronomy. 1,091