| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1997 | 978-1-901995-00-8 | C. van Breugel · K Kats | KeyBytes for Windows |
| 2001 | 978-1-901995-30-5 | Nigel Haigh · Cees van Breugel · Karel Kats | Keybytes Guide to Microsoft Access: Beginner Level Pack |
| '' | 978-1-901995-39-8 | Ewart Smith · Sue Chandler | Mathbytes Pack (MathsBytes) |