\[CloverLeaf] (Mathematica Character Name)

Unicode: 2318. Alias: Esc cl Esc. Letter-like form. Used on Macintosh and other computers to indicate command keys.

\[Cup] (Mathematica Character Name)

Unicode: 2323. Infix operator. x ⌣ y is by default interpreted as Cup[x,y]. Used in pure mathematics to mean cup product.

\[CurlyCapitalUpsilon] (Mathematica Character Name)

Unicode: 03D2. Aliases: Esc cU Esc, Esc cUpsilon Esc. Greek letter. Not commonly used. Used in astronomy for mass to light ratio.

\[DescendingEllipsis] (Mathematica Character Name)

Unicode: 22F1. Letter-like form. Used to indicate omitted elements in a matrix. Not the same as \[Continuation].

\[DiamondSuit] (Mathematica Character Name)

Unicode: 2662. Letter-like form. Sometimes used to indicate the end of a proof. Not the same as \[Diamond] or \[EmptyDiamond].

\[DiscretionaryLineSeparator] (Mathematica Character Name)

Unicode: F76E. Alias: Esc dlsep Esc. Spacing character. Used to invisibly denote a place where automatic line breaking should be allowed.

\[DiscretionaryPageBreakAbove] (Mathematica Character Name)

Unicode: F3BF Alias: Esc dpba Esc. Spacing character. Used to invisibly denote a place where automatic page-breaking should be allowed. The page break occurs immediately ...

\[DiscretionaryPageBreakBelow] (Mathematica Character Name)

Unicode: F3C6 Alias: Esc dpbb Esc. Spacing character. Used to invisibly denote a place where automatic page-breaking should be allowed. The page break occurs immediately ...

\[DiscretionaryParagraphSeparator] (Mathematica Character Name)

Unicode: F76F. Alias: Esc dpsep Esc. Spacing character. Used to invisibly denote a place where automatic line-breaking should be allowed, resulting in the appearance of a ...

\[DoubleContourIntegral] (Mathematica Character Name)

Unicode: 222F. Compound operator. ∯ f s is by default interpreted as ContourIntegral[f,s]. Used to indicate integrals over closed surfaces.