The functionality of FactorIntegerECM can be obtained using the enhanced Mathematica kernel function FactorInteger.
All the functionality of NumericalMath`NResidue` is now available in the newly created Numerical Calculus Package.
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.
AddOnHelpPath is a global option that specifies which directories are searched for additional help files used within the help system.
AutoloadPath is a global option that specifies from which directories packages are automatically loaded when Mathematica is started.
ConfigurationPath is a global option that specifies which directories are searched for systemwide configuration information.
NotebookPath is a global option that determines which directories are searched when a specified notebook is needed.
PreferencesPath is a global option that specifies which directories are searched for user-specific settings when Mathematica is started.
SystemHelpPath is a global option that specifies which directories are searched for the help notebooks used within the help system.