| 24071 | Ondas | ZX-Spectrum 48K | Spanish |
| 14976 | Opera Storys 1 | ZX-Spectrum 48K | Spanish |
| 15859 | Opera Super Sports | ZX-Spectrum 48K | Spanish |
| 15031 | Operacion Conquista | ZX-Spectrum 48K | Spanish |
| 24666 | Operacion: Misiles SS-24 | ZX-Spectrum 48K | Spanish |
| 14358 | Operaciones Matematicas | ZX-Spectrum 48K | Spanish |
| 42926 | Opp! | ZX-Spectrum 48K | Spanish |
| 20668 | Optocheck | ZX-Spectrum 48K | Spanish |
| 37441 | Oraculo Egipcio | ZX-Spectrum 48K | Spanish |
| 15300 | Ordenador Educativo issue 01 | ZX-Spectrum 48K | Spanish |
| 15301 | Ordenador Educativo issue 02 | ZX-Spectrum 48K | Spanish |
| 15302 | Ordenador Educativo issue 03 | ZX-Spectrum 48K | Spanish |
| 15303 | Ordenador Educativo issue 04 | ZX-Spectrum 48K | Spanish |
| 15304 | Ordenador Educativo issue 05 | ZX-Spectrum 48K | Spanish |
| 15305 | Ordenador Educativo issue 06 | ZX-Spectrum 48K | Spanish |
| 15306 | Ordenador Educativo issue 07 | ZX-Spectrum 48K | Spanish |
| 16269 | Ordenaletras | ZX-Spectrum 48K | Spanish |
| 16062 | Organo | ZX-Spectrum 48K | Spanish |
| 24685 | Organo | ZX-Spectrum 48K | Spanish |
| 18120 | Organo | ZX-Spectrum 48K | Spanish |