All the functionality in DiscreteMath`ComputationalGeometry` is available through the new Computational Geometry Package.

Plot, ListPlot, and similar functions have new Filling and FillingStyle options.

Regress and DesignedRegress are now available using the built-in function LinearModelFit. The function DesignMatrix has been added to the built-in Mathematica kernel. The ...

All the functionality in Miscellaneous`BlackBodyRadiation` is now available through the newly created Black Body Radiation Package.

All the functionality of NumericalMath`Microscope` is now available in the newly created Computer Arithmetic Package. The function Microscope has been renamed MicroscopePlot. ...

All the functionality of NumericalMath`NIntegrateInterpolatingFunct`is now available in the newly created Function Approximations Package.

All the functionality of NumericalMath`NSeries` is now available in the newly created Numerical Calculus Package.

All functionality is available in the newly created Statistical Plots Package. SymbolShape and SymbolStyle options are replaced by PlotMarkers. PlotJoined option is replaced ...

ConvexHull[{{x_1, y_1}, {x_2, y_2}, ...}] yields the planar convex hull of the points {{x_1, y_1}, ...}, represented as a list of point indices arranged in counterclockwise ...

DelaunayTriangulation[{{x_1, y_1}, {x_2, y_2}, ...}] yields the planar Delaunay triangulation of the points {{x_1, y_1}, ...}.