$ProcessorCount (Built-in Mathematica Symbol)

$ProcessorCount gives the number of processor cores available on the computer system on which Mathematica is being run.

SMILES (.smi) (Mathematica Import/Export Format)

MIME type: chemical/x-daylight-smiles SMILES chemical format. Commonly used to describe the structure of chemical molecules. SMILES is an acronym for Simplified Molecular ...

PoleZeroMarkers (Built-in Mathematica Symbol)

PoleZeroMarkers is an option for RootLocusPlot that specifies the markers to be drawn on the complex plane at the open-loop poles, closed-loop poles, and open-loop zeros.

$Path (Built-in Mathematica Symbol)

$Path gives the default list of directories to search in attempting to find an external file.

Standalone Mathematica Kernels (Mathematica Guide)

Mathematica's core language and computation capabilities can be accessed not only through its rich interactive notebook interface, but also directly through a command-line ...

[Right-click] > Show Cell (Mathematica Menu Item)

Show Cell toggles between the expression and display forms of a cell.

Contexts (Built-in Mathematica Symbol)

Contexts[] gives a list of all contexts. Contexts["string"] gives a list of the contexts that match the string.

ControllerInformation (Built-in Mathematica Symbol)

ControllerInformation[] gives dynamically updated information on currently connected controller devices.

$Notebooks (Built-in Mathematica Symbol)

$Notebooks is True if Mathematica is being used with a notebook-based front end.

SQLColumnNames (DatabaseLink Symbol)

SQLColumnNames[conn] returns a list of {table, name} pairs for each column in an SQL connection.