Saveable is an option for notebooks that specifies whether a notebook can be saved.
SpanLineThickness is an option for selections that specifies the thickness in printer's points of line-spanning characters such as \[Backslash][VerticalLine] and ...
SpanMaxSize is an option for selections that specifies the maximum size of spanning characters such as parentheses and brackets.
SpanMinSize is an option for selections that specifies the minimum size of spanning characters such as parentheses and brackets.
StartupSound is a global option that specifies whether Mathematica plays a sound when it is launched.
StyleNameDialogSettings -> {opt -> val} is a global option that specifies the cell style displayed in the Custom Style dialog box.
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.
WindowFrameElements is an option for notebooks that specifies the elements to include in the frame of the window used to display the notebook on the screen.
MinimumVertexCover[g] finds a minimum vertex cover of graph g.
The built-in function Reduce provides the functionality previously found in Algebra`InequalitySolve`.