ClearSystemCache[] clears internal system caches of stored results.
DefaultFaceGridsStyle is a low-level option for 3D graphics functions that specifies the default style to use in rendering face grids.
DefaultFieldHintStyle is a low-level option for InputField that specifies the default style to use for displaying the field hint.
DefaultFrameTicksStyle is a low-level option for 2D graphics functions that specifies the default style to use in rendering frame ticks.
DefaultGridLinesStyle is a low-level option for 2D graphics functions that specifies the default style to use in rendering grid lines.
DefaultMenuStyle is a low-level option for menu-generating constructs that specifies the default style to use for displaying menu items.
Deletable is an option for Cell that specifies whether the cell can be deleted interactively using the front end.
DifferentialD[x] displays as \[DifferentialD]x.
Environment["var"] gives the value of an operating system environment variable.
FieldHint is an option for InputField that specifies contents to display when the input field is empty.