LibraryFunction[args] represents a function that has been loaded from a Wolfram Library.
LibraryFunctionUnload[fun] unloads a LibraryFunction so that it cannot be used.
LibraryUnload[lib] unloads all functions that have been loaded from a Wolfram Library, then it unloads the library.
LinearFractionalTransform[m] gives a TransformationFunction that represents a linear fractional transformation defined by the homogeneous matrix m. ...
LinearOffsetFunction is an option for linear and generalized linear model fitting functions that specifies a component for the model that is to be assumed known.
LinkConnect["name"] connects to a MathLink link created by another program.
LinkFunction is an option for GeneralizedLinearModelFit that specifies the link function for the generalized linear model.
LiouvilleLambda[n] gives the Liouville function \[Lambda](n).
ListCurvePathPlot[{{x_1, y_1}, {x_2, y_2}, ...}] plots a curve that corresponds to a smooth path through the specified points.
ListPlay[{a_1, a_2, ...}] creates an object that plays as a sound whose amplitude is given by the sequence of levels a_i.