Pure Science

Star Trek Nebula Classification

"A nebula is an interstellar cloud of dust, gas, and plasma, where star formation usually occurs. In the year 2400, the Federation introduced a new system to classify nebulae. The new system first assigns the nebula a letter designation based upon its general composition. If the nebula has any unusual quirks, it is assigned an additional number designation. For example, a Class F2 Nebula is a Dark Nebula that contains disruptive electromagnetic radiation."

Star Trek Planetary Classification

"A planet is a celestial body in orbit around a star or stellar remnants, that has sufficient mass for self-gravity and is nearly spherical in shape. A planet must not share its orbital region with other bodies of significant size (except for its own satellites), and must be below the threshold for thermonuclear fusion of
deuterium. If a celestial body meets those requirements, it is considered a planet; at that point, the planet is further classified by its atmosphere and surface conditions into one of twenty-two categories."

Natural England Corporate Vocabulary

"The Corporate Vocabulary is a purpose-built indexing tool which can be used for many applications across Natural England to search for and retrieve information more effectively. It facilitates accurate and consistent indexing and, by showing the relationships between different terms, it allows the most appropriate terms to be chosen, which improves the relevance of the information found."

Everglades Online Thesaurus


PIRA Demonstration Classification Scheme

"The goal of the Physics Instructional Resource Association (PIRA) Demonstration Classification Scheme is to create a logically organized and universally inclusive taxonomy giving a unique code to every lecture demonstration. (...) The topic and concept divisions of the structure loosely follow the standard textbook organization of chapter and section, although they were created to organize existing demonstrations, not cover the entirety of introductory physics, and therefore skip some areas of the curriculum covered by standard textbooks.

Tesauro del Medio Ambiente para América Latina y el Caribe

"Para una mejor comprensión del tema y adecuada aplicación de los descriptores en el proceso de análisis de información ambiental, hemos considerado necesario presentar en la primera parte del tesauro, los módulos o grandes categorías bajo los cuales se han agrupado los descriptores.
Estas categorías ofrecen una visión de conjunto de los componentes del medio ambiente y coinciden con la organización que le otorgan la mayoría de los especialistas, para estudiar el contexto ambiental latinoamericano.

"For a better understanding of the subject and adequate application of the descriptors in the process of analysis of environmental information, we considered it necessary to present in the first part of the thesaurus, the modules or large categories under which the descriptors have been grouped.
These categories offer an overview of the components of the environment and coincide with the organization that is given by the majority of specialists to study the Latin American environmental context.