| 22724 | The Shrink | ZX-Spectrum 48K | English |
| 7065 | The Sidney Affair | ZX-Spectrum 48K | English |
| 28104 | The Siege of Doune Castle | ZX-Spectrum 16K | English |
| 12624 | The Siege of Fort Apache | ZX81 16K | English |
| 40905 | The Sight of Music | ZX81 16K | English |
| 2000323 | The Silicon Idol | - | English |
| 15073 | The Sillycon War | ZX-Spectrum 48K | English |
| 2001014 | The Simon & Schuster Question & Answer Book, Computers | - | English |
| 4513 | The Simpsons: Bart vs. the Space Mutants | ZX-Spectrum 128K | English |
| 2000326 | The Sinclair Book of Students' Calculations | - | English |
| 2000327 | The Sinclair QDOS Companion: A Guide to the QL Operating System | Sinclair QL | English |
| 2000979 | The Sinclair QL | Sinclair QL | English |
| 2000329 | The Sinclair QL Companion | Sinclair QL | English |
| 2000334 | The Sinclair Spectrum in Focus | - | English |
| 2000336 | The Sinclair Story | - | English |
| 31132 | The Sinclair Tandoori | ZX-Spectrum 16K | English |
| 2000338 | The Sinclair ZX81: Programming for Real Applications | - | English |
| 42865 | The Sine | ZX-Spectrum 48K | English |
| 42556 | The Sirens of Space | ZX-Spectrum 48K | English |
| 35126 | The Skeleton | - | English |