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.
$Inspector is a global variable which gives a function to apply when the inspector is invoked from an interrupt menu.
$NewMessage is a global variable which, if set, is applied to the symbol name and tag of messages that are requested but have not yet been defined.
$VersionNumber is a real number which gives the current Mathematica kernel version number, and increases in successive versions.
Mathematica is uniquely suited for processing symbolic expressions because of its powerful pattern-matching abilities and large collection of built-in structural manipulation ...