UnrankSubset[n, l] gives the n\[Null]^th subset of list l, listed in some canonical order.

VertexCoverQ[g, c] yields True if the vertices in list c define a vertex cover of graph g.

The built-in function Reduce provides the functionality previously found in Algebra`InequalitySolve`.

All the functionality in DiscreteMath`Combinatorica` is available in the newly created Combinatorica Package.

Some of the functionality in Graphics`Spline` has been added to the built-in Mathematica kernel.

All the functionality of Miscellaneous`Units`is now available in the newly created Units Package.

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

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

RegressionReport and related symbols have been replaced by FittedModel properties. Weights has been added to the built-in Mathematica kernel. Ellipsoid is now available in ...

SystemInformation gives detailed information about your Mathematica system. "Packages & Files" under the Kernel tab gives information about the packages currently loaded into ...