\[SpadeSuit] (Mathematica Character Name)

Unicode: 2660. Letter-like form.

\[SpanFromAbove] (Mathematica Character Name)

Unicode: F3BB. Alias: Esc sfa Esc.

\[SpanFromBoth] (Mathematica Character Name)

Unicode: F3BC. Alias: Esc sfb Esc.

\[SpanFromLeft] (Mathematica Character Name)

Unicode: F3BA. Alias: Esc sfl Esc.

\[UAcute] (Mathematica Character Name)

Unicode: 00FA. Alias: Esc u' Esc. Letter. Included in ISO Latin-1.

\[UHat] (Mathematica Character Name)

Unicode: 00FB. Alias: Esc u^ Esc. Letter. Included in ISO Latin-1.

\[UndirectedEdge] (Mathematica Character Name)

Unicode: 0F3D4. Aliases: Esc ue Esc. Infix operator with built-in evaluation rules. uv is by default interpreted as UndirectedEdge[u,v].

\[UpArrowBar] (Mathematica Character Name)

Unicode: 2912. Infix arrow operator. x ⤒ y is by default interpreted as UpArrowBar[x,y]. Extensible character.

\[Uranus] (Mathematica Character Name)

Unicode: 2645.

\[Venus] (Mathematica Character Name)

Unicode: 2640.