| Manufacturer | System |
| Arnold | N |
| Artin | Racy |
| Atlas | HO Code 100, HO Code 83, HO True Track, N Track, O Track |
| Bemo | HOe, HOm, HOm Code 70 |
| Buco | O |
| Carrera | 160 |
| Faller | Car System, HO Buildings (in Bearbeitung), AMS, AMS (1-spurig) |
| Ferro-Suisse | Ferro Rail HOm, Ferro Rail Om |
| Fleischmann | HO Modellgleis, HO Profigleis, N Piccolo |
| Fulgurex | HO/HOn3 Shinohara Code 70, HOn3 Shinohara Code 70, N Shinohara Code 70, HO Shinohara Code 100, HO Shinohara Code 70 |
| Hegob | Spur 1 |
| Hornby | HO |
| Hübner | Spur 1, Spur 1e |
| Ibertren | N |
| Jouef | HO |
| Kato | HO Unitrack, N Unitrack |
| Kleinbahn | HO |
| Lebu | G |
| Lego | Duplo, Trains |
| Lehmann | Toy Train |
| LGB | G |
| Life Like | Life Like Racing |
| Lima | HO, HO NEM 120 |
| Lotus | G |
| Märklin | Spur 1, HO Alpha, HO C, HO Metall, HO Kunststoff, HO Modellgleise (1950-60), Z |
| Mattel | Tyco, Tyco 1-spurig |
| Max Trax | 4-spurig, 6-spurig |
| Model Rail | Om |
| Modulsysteme | MAS 500, HOm MAS 60 |
| Ninco | Ninco 180 mm |
| Peco | G Streaml. Code 250, HO Setrack Code 100, HO Streaml. Code 100, HO Streaml. Code 75, HOe Streaml. Code 80, HOm Streaml. Code 75, I Streaml. Code 200, Im Streaml. Code 200, N Setrack Code 80, N Streaml. Code 55, N Streaml. Code 80, O Flat Code 143, O Streaml. Code 124, Oe Streaml. Code 100, Z Code 60 |
| Piko | HO Standard, HO, N |
| Pilz | HO Standard |
| Roco | 2.5 mm, HO (1960-1980), HO Rocoline m. Bettung, HO Rocoline o. Bettung, HOe, N, O, Alpin Line |
| Scheba | G/IIg |
| TdV-Revalda | G |
| Thiel | G |
| Tillig | System HO-HOm, HO Pilz Elite, HO Code 100, TT System Pilz, TT System Tillig |
| Tomy | AFX Racing |
| Trix | HO, N Minitrix, Trix Express |
| Utz | Om |