$CharacterEncodings (Built-in Mathematica Symbol)

$CharacterEncodings gives the list of character encodings that can be used.

$CompilationTarget (Built-in Mathematica Symbol)

$CompilationTarget gives the default value for the option CompilationTarget of Compile.

$ConfiguredKernels (Built-in Mathematica Symbol)

$ConfiguredKernels is the default list of kernels that are configured to be launched for parallel computing.

$Context (Built-in Mathematica Symbol)

$Context is a global variable that gives the current context.

$ContextPath (Built-in Mathematica Symbol)

$ContextPath is a global variable that gives a list of contexts, after $Context, to search in trying to find a symbol that has been entered.

$Display (Built-in Mathematica Symbol)

$Display gives a list of files and pipes to be used with the default $DisplayFunction.

$DistributedContexts (Built-in Mathematica Symbol)

$DistributedContexts is the default value of the DistributedContexts option of functions such as ParallelTable and ParallelMap.

$Echo (Built-in Mathematica Symbol)

$Echo gives a list of files and pipes to which all input is echoed.

$ExportFormats (Built-in Mathematica Symbol)

$ExportFormats gives a list of export formats currently supported in your Mathematica system.

$FormatType (Obsolete Mathematica Symbol)

As of version 6.0, $FormatType has been superseded by explicit settings for FormatType in Graphics and related functions.