As of Version 8, MultinomialDistribution is part of the built-in Mathematica kernel.
As of Version 8, MultinormalDistribution is part of the built-in Mathematica kernel.
As of Version 8.0, MultiPoissonDistribution has been renamed to MultivariatePoissonDistribution and is part of the built-in Mathematica kernel.
As of Version 8, MultivariateTDistribution is part of the built-in Mathematica kernel.
As of Version 8, NegativeMultinomialDistribution is part of the built-in Mathematica kernel.
As of Version 8, PrincipalComponents is part of the built-in Mathematica kernel.
As of Version 7.0, NonlinearRegress has been superseded by NonlinearModelFit and is part of the built-in Mathematica kernel.
PieChart
(Obsolete Pie Charts Package Symbol) As of Version 7.0, PieChart is part of the built-in Mathematica kernel.
As of Version 7.0, PieEdgeStyle has been superseded by ChartStyle.
As of Version 7.0, PieExploded has been superseded by SectorSpacing.