SpanLineThickness is an option for selections that specifies the thickness in printer's points of line-spanning characters such as \[Backslash][VerticalLine] and ...
SpanMaxSize is an option for selections that specifies the maximum size of spanning characters such as parentheses and brackets.
SpanMinSize is an option for selections that specifies the minimum size of spanning characters such as parentheses and brackets.
All the functionality in DiscreteMath`Combinatorica` is available in the newly created Combinatorica Package.
All the functionality of Miscellaneous`Units`is now available in the newly created Units Package.
All the functionality of NumericalMath`NResidue` is now available in the newly created Numerical Calculus Package.
ConfigurationPath is a global option that specifies which directories are searched for systemwide configuration information.
GraphDiameter[g] gives the maximum eccentricity of the vertices in the graph g.
PrivatePaths -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for paths private to the notebook front end.
$VersionNumber is a real number which gives the current Mathematica kernel version number, and increases in successive versions.