ColorSpace is an option for Image and related functions that specifies the color space to which color values refer.
ControlActive[act, norm] evaluates to act if a control that affects act is actively being used, and to norm otherwise.
CreateIntermediateDirectories is an option for CreateDirectory and related functions that specifies whether to create intermediate directories in a directory path specified.
DefaultDuration is an option to Animate and related functions that specifies the default total duration of the animation in seconds.
Denominator[expr] gives the denominator of expr.
DisplayAllSteps is an option to Animate and related functions that specifies whether all frames should be displayed in an animation, even if to do so would slow the animation ...
Expression is a symbol that represents an ordinary Mathematica expression in Read and related functions.
FeedbackType is an option for some control system functions that specifies the feedback type.
LegendAppearance is an option for charting functions that specifies the appearance of any legends that are generated.
LinkProtocol is an option to LinkLaunch, Install, and related functions that specifies the underlying data transport protocol to use for a new MathLink link.