Since Version 3.0 (released in 1996), LinkOpen has been superseded by LinkCreate, LinkConnect, and LinkLaunch.
Literal
(Obsolete Mathematica Symbol) Since Version 3.0 (released in 1996), Literal has been superseded by HoldPattern.
As of Version 6.0, LongestMatch has been superseded by the pattern object Longest.
Since Version 5.0 (released in 2003), LUBackSubstitution has been superseded by LinearSolveFunction.
As of Version 6.0, MeshRange has been superseded by DataRange.
As of Version 6.0, NotebookCreate has been superseded by CreateDocument, CreatePalette, and related functions.
Since Version 2.0 (released in 1991), Plot3Matrix has been superseded by ViewCenter and ViewVertical.
As of Version 6.0, PlotJoined has been superseded by Joined and ListLinePlot.
As of Version 6.0, PolygonIntersections has been superseded by various options for Export.
Random
(Obsolete Mathematica Symbol) As of Version 6.0, Random has been superseded by the functions RandomReal and RandomInteger.