The ancronyms are the same as the ones used in the book by Karsten Steiger (Opern-Diskographie, Saur: München 2008).
| Abbreviation | Label | Remark |
| ABC | American Broadcasting Company | |
| BASF | Badische Anilin- und Sodafabriken | |
| BBC | British Broadcasting Corporation | |
| BCS | Bel Canto Society | |
| BLV | BellaVoce | |
| BMC | Budapest Music Center Records | |
| BMG | Bertelsmann Music Group | |
| BWS | Bruno Walter Society | |
| CA | Celestial Audio | Internet label |
| CBC | Canadian Broadcasting Company | |
| CBS | Columbia Broadcasting Society | |
| CPO | Classic Production Osnabrück | |
| CRQ | Classical Recordings Quarterly | |
| DG | Deutsche Grammophon | |
| DHM | Deutsche Harmonia Mundi | |
| EA | Estro Armonico | |
| EJS | Edward J. Smith Recordings | Defunct LP-label |
| EMI | Electrical and Musical Industries | |
| ENGT | Encore Productions/Grand Tier | |
| ERR | Ed Rosen Records | Defunct LP-label |
| FKM | Fachmann für Klassische Musik | |
| FSM | Fono Schallplatten | |
| FWR | Roger W. Frank | Defunct LP-label |
| GAO | Golden Age of Opera | |
| GAW | Die goldene Aera Richard Wagners | |
| GDS | Giuseppe di Stefano Records | |
| GFC | Great Opera Favourites of the Century | |
| GM | Golden Melodram | |
| GOP | Great Opera Performances | |
| Hag | Hamburger Archiv für Gesangskunst | |
| HMV | His Master’s Voice | |
| HO | House of Opera | Internet label |
| HOPE | Historical Opera Performances Edition | |
| HRE | Historical Recording Enterprises | |
| IDIS | Istituo Discografico Italiano S.R.L. | |
| IGI | I Grandi Interpreti | |
| IGS | International Gramophone Soceiety | |
| INA | Institut national de l’audiovisuel | |
| INBA | Instituto Nacional de Bellas Artes | |
| IP | Immortal Performances | |
| KRO | Katholieke Radio Omroep | |
| LRO | Live Rare Opera | |
| LS | Living Stage | |
| LyR | Lyrica Records | Internet Label |
| M&A | Music & Arts | |
| MCA | Music Corporation of America | |
| MD+G | Dabringhaus und Grimm | |
| MDP | Michael D. Polimeni | |
| MFA | Musique Française d’Aujourd’hui | |
| MGB | Migros Genossenschaftsbund | |
| MGM | Metro-Goldwyn-Mayer | |
| MHS | Musical Heritage Society | |
| MK | Meschdunarodnaja Kniga | Old Russian LP-label |
| MM | Movimento Musica | |
| MMS | Musical Masterwork Society | |
| MOP | Metropolitan Opera Performances | |
| MRF | Mauro R. Fuguette Records | Defunct LP-label |
| NM | Nederlandse Muziek | |
| OA | Opera Addiction | Internet label |
| OD | Opera Depot | Internet label |
| OMS | Oriel Music Society | Defunct CD-label |
| OOP | Omega Opera Archiv | Internet label |
| PO | Premiereopera Italy | Internet label |
| RCA | Radio Corporation of America | |
| RHR | Robin Hood Records | Defunct LP-label |
| ROHS | Royal Opera House Series | |
| RR | Recital Records | |
| RRE | Rare Recorded Editon | |
| RTVE | Radio Television Espanola | |
| RTVS | Radiotelevizije Slovenija | |
| SNE | Societé Nouvelle d’Enregistrement | |
| SPA | Society of Participating Artists | |
| SRO | Standing Room Only | |
| SWF | Société Wilhelm Furtwängler | |
| TER | That’s Entertainment Records | |
| TIM | The International Music Company | |
| TOL | The Opera Lovers | Internet label |
| UORC | Unique Opera Records | Defunct LP-label |
| VAI | Video Artists International | |
| VMM | Vienna Modern Masters |