ABSTRACT
This chapter introduces commands to access databases containing up-to-date information from many different fields such as: astronomy, chemistry, economy, genetics, geography, and physics. These commands can be part of Mathematica-based programs. Mathematica has functions to access databases from many different fields such as: Physics and Chemistry, Earth Sciences, Astronomy, Life Sciences and Medicine, Economics and Finance, Mathematics, Linguistics, Engineering, People and History and Geography. The number of fields covered by Mathematica keeps on growing with each new release of the program. The big advantage of these functions is that they import the data – internally known as computable data or collections – in a format that makes their manipulation easy. When using them, Mathematica will connect to a server at Wolfram Research which in turn will access a specialized server containing the relevant data. There are three different types of data collections: Pre-computed and Aggregated from publicly available sources.
