Mathematica gives seamless immediate access to an ever-growing library of carefully curated and continually updated data maintained by Wolfram Research—all with a unified interface allowing complete interoperability and tight integration into
Mathematica and its computational and data presentation capabilities.
ElementData — bulk, atomic, chemical, etc. properties of chemical elements
ChemicalData — structural, physical and other properties of chemical compounds
IsotopeData — static and decay properties of all nuclear isotopes
ParticleData — properties of stable, unstable and resonance particles
AstronomicalData — properties of stars, planets and other objects
CountryData — many categories of data about countries, groups, etc.
CityData — properties of 250,000+ cities around the world
FinancialData — current and historical stock, fund, index, currency, etc. data
DictionaryLookup — use string patterns to look up words in the dictionary
WordData — properties of words and network of relations between them
ExampleData — many types of standard test and example data
Missing — symbolic representation of missing data
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