LimitsPositioningTokens is an option for selections that specifies a set of characters for which the option LimitsPositioning is set to True by default.
LineBreakWithin is an option for selections that specifies whether line breaks occur automatically when the end of a line is reached.
LinkConnect["name"] connects to a MathLink link created by another program.
ListPlay[{a_1, a_2, ...}] creates an object that plays as a sound whose amplitude is given by the sequence of levels a_i.
MedianDeviation[list] gives the median absolute deviation from the median of the elements in list.
symbol::tag is a name for a message.
MinusPlus[x] displays as \[MinusPlus]x.MinusPlus[x, y, ...] displays as x \[MinusPlus] y \[MinusPlus] ....
NCache
(Built-in Mathematica Symbol) NCache[x, xn] represents a numeric cache object for a quantity with exact value x and approximate numerical value xn.
Negative[x] gives True if x is a negative number.
NonNegative[x] gives True if x is a non-negative number.