NameQ (Built-in Mathematica Symbol)

NameQ["string"] yields True if there are any symbols whose names match the string pattern given, and yields False otherwise.

NullWords (Built-in Mathematica Symbol)

NullWords is an option for Read and related functions which specifies whether null words should be taken to exist between repeated word separators.

OperatingSystem (Built-in Mathematica Symbol)

OperatingSystem is an option for file and related operations that specifies the type of operating system to use to determine file name and other conventions.

PodWidth (Built-in Mathematica Symbol)

PodWidth is an option for WolframAlpha that determines the width parameters of the content returned by the Wolfram|Alpha API.

PossibleZeroQ (Built-in Mathematica Symbol)

PossibleZeroQ[expr] gives True if basic symbolic and numerical methods suggest that expr has value zero, and gives False otherwise.

PreferencesPath (Built-in Mathematica Symbol)

PreferencesPath is a global option that specifies which directories are searched for user-specific settings when Mathematica is started.

PrintingStyleEnvironment (Built-in Mathematica Symbol)

PrintingStyleEnvironment is an option for notebooks which specifies the style environment to be used in printing the notebook on paper.

RenameFile (Built-in Mathematica Symbol)

RenameFile["file_1", "file_2"] renames file_1 to file_2.

Resampling (Built-in Mathematica Symbol)

Resampling is an option that specifies the method to be used for resampling images.

RowMinHeight (Built-in Mathematica Symbol)

RowMinHeight is an option for the low-level function GridBox that specifies the minimum total height in units of font size that should be allowed for each row.