A-sharp or A♯ refers to: *

A♯ (musical note) A (A-sharp; French: ) is the eleventh semitone of the solfège. This note lies a chromatic semitone above A (musical note), A and a diatonic semitone below B (musical note), B, thus being enharmonic to B♭ (musical note), B (French: ). When ...

, *

A-sharp major In Western musical notation, a key signature is a set of sharp (), flat (), or rarely, natural () symbols placed on the staff at the beginning of a section of music. The initial key signature in a piece is placed immediately after the clef ...

, enharmonic key to B-flat major *

A-sharp minor A-sharp minor is a minor musical scale based on A, consisting of the pitches A, B, C, D, E, F, and G. Its key signature has seven sharps. Its relative major is C-sharp major (or enharmonically D-flat major). Its parallel major, A-shar ...

* A Sharp (.NET), a port of the Ada programming language to the .NET environment * A Sharp (Axiom), a programming language for the Axiom computer algebra system

See also