HeldPart (Obsolete Mathematica Symbol)

Since Version 3.0 (released in 1996), HeldPart has been superseded by Extract.

HiddenSurface (Obsolete Mathematica Symbol)

As of Version 6.0, HiddenSurface -> False has been superseded by the setting PlotStyle -> FaceForm[].

HomeDirectory (Obsolete Mathematica Symbol)

Since Version 3.0 (released in 1996), HomeDirectory has been replaced by $HomeDirectory.

HTMLSave (Obsolete Mathematica Symbol)

HTMLSave is superseded by Export[..., "HTML"] in Version 6.

ImageRotated (Obsolete Mathematica Symbol)

As of Version 6.0, ImageRotated has been superseded by the "ImageTopOrientation" element specification.

LegendreType (Obsolete Mathematica Symbol)

Since Version 3.0 (released in 1996), LegendreType has been superseded by additional arguments to LegendreP and LegendreQ.

LinkOpen (Obsolete Mathematica Symbol)

Since Version 3.0 (released in 1996), LinkOpen has been superseded by LinkCreate, LinkConnect, and LinkLaunch.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Since Version 3.0 (released in 1996), Literal has been superseded by HoldPattern.

LongestMatch (Obsolete Mathematica Symbol)

As of Version 6.0, LongestMatch has been superseded by the pattern object Longest.

LUBackSubstitution (Obsolete Mathematica Symbol)

Since Version 5.0 (released in 2003), LUBackSubstitution has been superseded by LinearSolveFunction.