InsertResults is an option for NotebookEvaluate that determines whether to place the results of evaluation in the notebook being evaluated
Modal
(Built-in Mathematica Symbol) Modal is an option to functions such as CreateDialog that specifies whether the dialog that is created should be modal to the Mathematica front end.
PermutationOrder[perm] gives the order of permutation perm.
ShowContents is an option for selections that specifies whether an object represented by a StyleBox should be displayed on the screen or replaced by blank space.
ShowSpecialCharacters is an option for Style and Cell that specifies whether to replace \[Name], \:nnnn, etc. by explicit special characters.
SpanSymmetric is an option for selections that specifies whether vertically expandable characters are symmetric about the axis of the selection.
Streams
(Built-in Mathematica Symbol) Streams[] gives a list of all streams that are currently open. Streams["name"] lists only streams with the specified name.
f /: lhs := rhs assigns rhs to be the delayed value of lhs, and associates the assignment with the symbol f.
Temporary is an attribute assigned to symbols which are created as local variables by Module.
WindowClickSelect is a notebook option that specifies whether the window for the notebook should become selected if you click it.