A-sharp, A♯ or A# may refer to:
- A-sharp major, enharmonic to B-flat major
- A-sharp minor
- A♯ (musical note), musical pitch
- 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
This disambiguation page lists articles associated with the title A-sharp.
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