BoundaryStyle is an option for plotting functions that specifies the style in which boundaries of regions should be drawn.
BoxRatios is an option for Graphics3D that gives the ratios of side lengths for the bounding box of the three-dimensional picture.
ButtonSource is an option for the low-level function ButtonBox that specifies the first argument to give to the ButtonFunction for the button when the button is active and is ...
CharacterEncoding is an option for input and output functions which specifies what raw character encoding should be used.
Constants is an option for Dt which gives a list of objects to be taken as constants.
ContentSize is an option for Manipulate and other functions that specifies the size of the content area to use.
DateList[] gives the current local date and time in the form {year, month, day, hour, minute, second}. DateList[time] gives a date list corresponding to an AbsoluteTime ...
DefaultAxesStyle is a low-level option for graphics functions that specifies the default style to use in displaying axes and axes-like constructs.
DefaultFrameStyle is a low-level option for graphics and related constructs that specifies the default style to use in displaying their frames.
Distributed[x, dist] or x \[Distributed] dist asserts that the random variable x is distributed according to the probability distribution dist.Distributed[{x_1, x_2, ...}, ...