Cell > Notebook History... (Mathematica Menu Item)

Notebook History displays a time record of changes made in the input notebook.

Insert > Table/Matrix (Mathematica Menu Item)

Table/Matrix menu commands for creating and editing tables and matrices.

Edit > Undo (Mathematica Menu Item)

Undo reverses the previous action, if possible.

Help > Why the Beep?... (Mathematica Menu Item)

Why the Beep? opens a dialog with an explanation of why the front end produced a beep.

AnimationCycleRepetitions (Built-in Mathematica Symbol)

AnimationCycleRepetitions is an option for cells that specifies the number of times a given animation cycle should be repeated.

ArcCoth (Built-in Mathematica Symbol)

ArcCoth[z] gives the inverse hyperbolic cotangent coth -1 (z) of the complex number z.

AutoloadPath (Built-in Mathematica Symbol)

AutoloadPath is a global option that specifies from which directories packages are automatically loaded when Mathematica is started.

BabyMonsterGroupB (Built-in Mathematica Symbol)

BabyMonsterGroupB[] represents the sporadic simple baby monster group B.

Backward (Built-in Mathematica Symbol)

Backward is a symbol that represents the backward direction for purposes of motion and animation.

BarOrigin (Built-in Mathematica Symbol)

BarOrigin is an option to BarChart and related functions that specifies the origin placement for bars.