A-sharp

The correct title of this article is A#. The substitution or omission of the # sign is because of technical restrictions.

A-sharp may refer to:

A-sharp major or 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

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