As of Version 7.0, Histogram3D 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, BoxWhiskerPlot has been renamed to BoxWhiskerChart and is part of the built-in Mathematica kernel.
As of Version 8.0, ExpectedValue has been superseded by Expectation and NExpectation.
Histogram
(Obsolete Histograms Package Symbol) As of Version 7.0, Histogram is part of the built-in Mathematica kernel.
As of Version 8.0, QuantilePlot is part of the built-in Mathematica kernel.