Literal
(Obsolete Mathematica Symbol) Since Version 3.0 (released in 1996), Literal has been superseded by HoldPattern.
Since Version 2.0 (released in 1991), Plot3Matrix has been superseded by ViewCenter and ViewVertical.
Release
(Obsolete Mathematica Symbol) Since Version 2.0 (released in 1991), Release has been superseded by Evaluate and ReleaseHold.
Since Version 3.0 (released in 1996), ReplaceHeldPart has been superseded by ReplacePart.
Since Version 2.0 (released in 1991), ResetMedium has been superseded by SetOptions.
Since Version 2.0 (released in 1991), StartProcess has been superseded by Install and MathLink.
ToASCII
(Obsolete Mathematica Symbol) Since Version 2.0 (released in 1991), ToASCII has been superseded by ToCharacterCode.
Since Version 3.0 (released in 1996), ToHeldExpression has been superseded by ToExpression.
Since Version 5 (released in 2003), $UserAddOnsDirectory has been superseded by $UserBaseDirectory.
$$Media
(Obsolete Mathematica Symbol) Since Version 2.0 (released in 1991), $$Media has been superseded by Streams.