HHA

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HHA is an abbreviation for:

Halle Handel Edition , historical-critical complete edition of the works of the composer Georg Friedrich Handel
Hamburger Hochbahn AG, a transport company in Hamburg as a former company name
Graduate School of Aarhus , see Aarhus School of Business
high-hardness armor , hardened steel plate

Hha is an abbreviation for:

Hha (ح), Letter of the Jawi alphabet, see Ḥa