RootReduce (Built-in Mathematica Symbol)

RootReduce[expr] attempts to reduce expr to a single Root object.

Run (Built-in Mathematica Symbol)

Run[expr_1, expr_2, ...] generates the printed form of the expressions expr_i, separated by spaces, and runs it as an external operating system command.

ScheduledTasks (Built-in Mathematica Symbol)

ScheduledTasks[] returns a list of ScheduledTaskObject expressions that represent current tasks.

Selectable (Built-in Mathematica Symbol)

Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.

SelectionEvaluate (Built-in Mathematica Symbol)

SelectionEvaluate[notebook] replaces the current selection in a notebook with the result obtained by evaluating the contents of the selection in the kernel. ...

Skeleton (Built-in Mathematica Symbol)

Skeleton[n] represents a sequence of n omitted elements in an expression printed with Short or Shallow. The standard print form for Skeleton is <<n>>.

SoundVolume (Built-in Mathematica Symbol)

SoundVolume is an option to Sound and SoundNote and related functions that specifies the relative volume of the sound produced.

SpanCharacterRounding (Built-in Mathematica Symbol)

SpanCharacterRounding is an option for selections that specifies the method used for rounding a spanning character when its size is to be adjusted.

Underscript (Built-in Mathematica Symbol)

Underscript[x, y] is an object that formats as UnderscriptBox[x, y].

Unset (Built-in Mathematica Symbol)

lhs =. removes any rules defined for lhs.