$MaxNumber (Built-in Mathematica Symbol)

$MaxNumber gives the maximum arbitrary-precision number that can be represented on a particular computer system.

$MaxPiecewiseCases (Built-in Mathematica Symbol)

$MaxPiecewiseCases gives the maximum number of cases to allow in explicit Piecewise objects generated by expanding any single piecewise function.

$MaxPrecision (Built-in Mathematica Symbol)

$MaxPrecision gives the maximum number of digits of precision to be allowed in arbitrary-precision numbers.

$MaxRootDegree (Built-in Mathematica Symbol)

$MaxRootDegree specifies the maximum degree of polynomial to allow in Root objects.

$MessageGroups (Built-in Mathematica Symbol)

$MessageGroups is the list of rules that gives named message groups used in functions like On and Quiet.

$MessageList (Built-in Mathematica Symbol)

$MessageList is a global variable that gives a list of the names of messages generated during the evaluation of the current input line.

$MessagePrePrint (Built-in Mathematica Symbol)

$MessagePrePrint is a global variable whose value, if set, is applied to expressions before they are included in the text of messages.

$Messages (Built-in Mathematica Symbol)

$Messages gives the list of files and pipes to which message output is sent.

$MinMachineNumber (Built-in Mathematica Symbol)

$MinMachineNumber is the smallest positive machine-precision number that can be used on a particular computer system.

$MinNumber (Built-in Mathematica Symbol)

$MinNumber gives the minimum positive arbitrary-precision number that can be represented on a particular computer system.