Hallische Händel-Ausgabe
The Hallische Händel-Ausgabe is a multi-volume collection of the works of George Frideric Handel. It was first published in the 1950s: initially as an adjunct to the HG edition, but by 1958 as a collected edition in its own right. The collection's abbreviation of "HHA" can be used to identify individual works by Handel, for example Handel's Messiah can be referred to as "HHA i/17". For practical use, the HHA numbering of Handel's works has been superseded by the HWV numbering system.
Published by the George Frideric Handel Society, a major new edition comprising approximately 128 volumes is being released. It is expected to be completed by 2023 in the following configuration:
| Series | Description | Volumes |
| I | Oratorios and Large Cantatas | 32 |
| II | Operas | 41 |
| III | Church Music | 14 |
| IV | Instrumental Music | 19 |
| V | Shorter Vocal Works | 7 |
| VI | Supplement | 6 |
| VII | Handel Handbook | 5 |