What is an alpha symbol on a keyboard?

Excuse me, could you please clarify what you mean by an "alpha symbol" on a keyboard? Are you referring to the Greek letter alpha (α), which is not typically found on a standard English keyboard layout? Or perhaps you're asking about a specific key or symbol that represents an alphabetic character in some way? Could you provide more context or an example of what you're referring to? It would help me give you a more accurate answer.