Reference

A searchable reference to science-fiction writing and subjects

Classification and names for organisms in sequence databases

Dictionary, thesaurus and grammar reference in one service

Treaty records and depositary information

Radiology explanations organized around imaging topics

Official publications from the US federal government

Acronym meanings organized by subject context

Plant names linked to descriptions and distribution

Historical documents in law and diplomacy

A multilingual dictionary portal

Decode shorthand by topic or search direction

Mineral and gemstone descriptions for reference study

A multilingual library of source works

A biological-data resource portal from SIB

Biomedical literature citations with precise search routes

Education-research discovery with publication filters

English word and phrase definitions with topical explainers

Explore chemical elements through the periodic table

Norwegian encyclopedia entries across a broad subject range

Textbooks available through a multilingual portal

Full-text book search through a large book index

Ancient-history articles with illustrations and topic browsing

A journal library with regional and subject browsing

Psychological terminology with related explanatory articles