As of Version 7.0, FourierSinCoefficient is part of the built-in Mathematica kernel.
As of Version 7.0, FourierTrigSeries is part of the built-in Mathematica kernel.
As of Version 7.0, InverseDTFourierTransform has been renamed to InverseFourierSequenceTransform and is part of the built-in Mathematica kernel.
As of Version 7.0, histogram functionality is built into Mathematica. >>
As of Version 7.0, ConfidenceLevel is part of the built-in Mathematica kernel. >>
BasisNames
(Obsolete Linear Regression Package Symbol) As of Version 7.0, BasisNames has become an optional argument for LinearModelFit.
As of Version 7.0, DesignMatrix is part of the built-in Mathematica kernel.
As of Version 7.0, IncludeConstant has been renamed to IncludeConstantBasis and is part of the built-in Mathematica kernel.