NonlinearFit is replaced by FindFit. NonlinearRegress functionality is now available using the built-in function NonlinearModelFit.
Distributions defined in this package have been added to the built-in Mathematica kernel. Random and RandomArray are replaced by RandomReal.
All functionality is available in the newly created Statistical Plots Package. SymbolShape and SymbolStyle options are replaced by PlotMarkers. PlotJoined option is replaced ...
All of the functionality in Utilities`Benchmark` is now available through the newly created Benchmarking Package.
The functionality of FilterOptions is provided by the kernel function FilterRules.
Utilities`MemoryConserve` was available as an add-on package in previous versions of Mathematica and is now available on the web at ...
All the functionality of Utilities`Notation` is now available in the newly created Notation Package.
SystemInformation gives detailed information about your Mathematica system. "Packages & Files" under the Kernel tab gives information about the packages currently loaded into ...
Utilities`ShowTime` was available as an add-on package in previous versions of Mathematica and is now available on the web at library.wolfram.com/infocenter/MathSource/6792.
As of Version 7, the Vector Field Plotting Package has been integrated into the Mathematica kernel.