PlotLegend is an option for Plot, ListPlot, and related functions that assigns text to lines in a 2D plot to create a legend for that plot.

Partial differentiation operations. This gives ( ∂ ) / ( ∂x ) x^n. This gives the third derivative.

Mathematica not only allows you to insert arbitrary graphics into user interfaces, but also provides convenient characters that allow you immediately to build and document ...

The symbolic character of Mathematica graphics makes it straightforward to combine together different graphics constructs, both for presentation and interactive behavior—and ...

The symbolic architecture of Mathematica notebooks allows immediate interoperability with a wide range of document, web, graphics and other formats. Mathematica automatically ...

Combining methods from set theory, topology, and discrete mathematics, mathematical morphology provides a powerful approach to processing images and other discrete data. ...

ExcludedForms is an option for FullSimplify which can be set to a list of patterns for expressions that should not be touched if they are encountered at intermediate steps in ...

RecordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for records.

Expressions corresponding to cells. Here is a notebook containing a text cell and a Mathematica input cell. Here are the expressions corresponding to these cells.

AbsoluteTime[] gives the total number of seconds since the beginning of January 1, 1900, in your time zone.AbsoluteTime[{y, m, d, h, m, s}] gives the absolute time ...