RotateRight[expr, n] cycles the elements in expr n positions to the right. RotateRight[expr] cycles one position to the right. RotateRight[expr, {n_1, n_2, ...}] cycles ...
SetFileDate["file"] sets the modification and access dates for a file to be the current date.
ShowCursorTracker is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.
SpanFromAbove is a symbol that can appear at a particular position in a Grid or related construct to indicate that the corresponding position is occupied by a spanning ...
SqrtBox
(Built-in Mathematica Symbol) SqrtBox[x] is a low-level box construct that represents the displayed object Sqrt[x] in notebook expressions.
StringLength["string"] gives the number of characters in a string.
SystemInformation[] gives detailed information about the Mathematica system being run. SystemInformation["comp"] gives a list of rules with information about the component " ...
TextClipboardType is an option for cells that specifies how Edit \[FilledRightTriangle] Copy treats a cell when converting it for the system's textual clipboard.
TextJustification is an option for Cell and Inset which specifies how much lines of text can be stretched in order to make them be the same length.
Through
(Built-in Mathematica Symbol) Through[p[f_1, f_2][x]] gives p[f_1[x], f_2[x]]. Through[expr, h] performs the transformation wherever h occurs in the head of expr.