First
(Built-in Mathematica Symbol) First[expr] gives the first element in expr.
GenerateConditions is an option for Integrate, Sum, and similar functions that specifies whether explicit conditions on parameters should be generated in the result.
Last
(Built-in Mathematica Symbol) Last[expr] gives the last element in expr.
Left
(Built-in Mathematica Symbol) Left is a symbol that represents the left-hand side for purposes of alignment and positioning.
Longitude[pos] gives the longitude in degrees of a geographic position specified by pos.Longitude[pos, datum] gives the longitude referring to the specified geodetic datum.
MaxExtraBandwidths is an option to SmoothKernelDistribution that controls the behavior outside that data range.
MenuSortingValue is an option for cells and notebooks that specifies where a cell style, stylesheet, or palette is listed in the Format \[FilledRightTriangle] Style submenu, ...
Opening
(Built-in Mathematica Symbol) Opening[image, ker] gives the morphological opening of image with respect to the structuring element ker.Opening[image, r] gives the opening with respect to a range r square.
RadioButtonBar[x, {val_1, val_2, ...}] represents a radio button bar with setting x and with labeled radio buttons for values val_i.RadioButtonBar[Dynamic[x], {val_1, val_2, ...
Right
(Built-in Mathematica Symbol) Right is a symbol that represents the right-hand side for purposes of alignment and positioning.