Some of the functionality of the World Plotting Package is now available in CountryData.
As of Version 6.0, NIntegrate natively supports InterpolatingFunction objects.
The built-in function Fit finds a least-squares fit to a list of data as a linear combination of the specified basis functions. The functions Regress and DesignedRegress ...
As of Version 8, HotellingTSquareDistribution is part of the built-in Mathematica kernel.
As of Version 7.0, some of the functionality of the Splines Package is now built into the Mathematica kernel. >>
As of Version 7.0, MaxArrowLength has been superseded by VectorScale.
ScaleFactor
(Obsolete Vector Field Plots Package Symbol) As of Version 7.0, ScaleFactor has been superseded by VectorScale.
As of Version 7.0, ScaleFunction has been superseded by VectorScale.
VectorHeads
(Obsolete Vector Field Plots Package Symbol) As of Version 7.0, VectorHeads has been superseded by VectorStyle.