In Version 6.0, StirlingFirst has been superseded by StirlingS1.
As of version 6.0, NearestNeighbor has been superseded by Nearest[{{x_1, y_1}, {x_2, y_2}, ...} -> Automatic, {a, b}].
ZeroQ
(Obsolete Developer Package Symbol) As of Version 6.0, ZeroQ has been superseded by PossibleZeroQ.
As of Version 7.0, DTFourierTransform has been renamed to FourierSequenceTransform and is part of the built-in Mathematica kernel.
As of Version 7.0, FourierCoefficient is part of the built-in Mathematica kernel.
As of Version 7.0, FourierCosCoefficient is part of the built-in Mathematica kernel.
As of Version 7.0, FourierSeries is part of the built-in Mathematica kernel.
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.