| 2001093 | Timex/Sinclair 1000 User's Guide volume 1 | - | English |
| 2001094 | Timex/Sinclair 1000 User's Guide volume 2 | - | English |
| 2001095 | Timex/Sinclair Computer Games Programs | - | English |
| 2000834 | Timex/Sinclair Computer Program Writing Workbook | - | English |
| 2001366 | Timex/Sinclair Interfacing | - | English |
| 2000733 | Todos los Programas para Tu Spectrum | - | Spanish |
| 2000666 | Toepassingen en Spellen voor de ZX81 | - | Dutch |
| 2000394 | Tout Savoir sur Sinclair QL | Sinclair QL | French |
| 2001252 | Trade Secret | - | English |
| 2001341 | Transistor Circuits Manual No. 4 | - | English |
| 2001319 | Travesuras con el ZX81 | - | Spanish |
| 2001187 | Trigger Happy | - | English |
| 2000843 | Troubleshooting and Repairing Personal Computers | - | English |
| 2000505 | Turbocharge Your ZX Spectrum | - | English |
| 2001296 | Turtle Fun LOGO with the ZX Spectrum 48K | - | English |
| 2000752 | Ucimo Se Programirati ZX Spectrum | - | Slovenian |
| 2000839 | Um Sistema de Aquisição de Dados Usando o TK | - | Portuguese |
| 2001432 | Understanding Artificial Intelligence | - | English |
| 2000896 | Understanding C | - | English |
| 2000398 | Understanding Computer Graphics | - | English |