AnimationDisplayTime is an option for Cell that specifies the minimum time in seconds for which a cell should be displayed in the course of an animation that runs through a ...

AnimationRate is an option for Animate and Animator that specifies at what rate an animation should run, in units per second.

AnimationRepetitions is an option to Animate and related functions that specifies how many times the animation they create runs before stopping.

AppearanceElements is an option for functions like Manipulate that specifies what elements should be included in the displayed form of the object generated.

AutoAction is an option for objects such as Slider, Locator, and Button that specifies whether they should automatically take action whenever the mouse pointer is over them, ...

AutoDelete is an option for boxes that specifies whether a box is automatically deleted when its contents are edited.

AutoGeneratedPackage is an option for notebooks that specifies whether a package is automatically created when a notebook that contains initialization cells or groups is ...

AutoItalicWords is an option for Cell that gives a list of words that should automatically be put in italics when they are entered.

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

Automatic represents an option or other value that is to be chosen automatically by a built-in function.