| title | ISBN-13 | year of publication |
|---|---|---|
| Application of Number | 978-0-582-42487-6 | 2000 |
| Application of Number: Bk.2 | 978-0-582-42486-9 | 2000 |
| Communication: Bk.2 | 978-0-582-42484-5 | 2000 |
| Information Technology | 978-0-582-42488-3 | 2000 |
| Information Technology: Bk. 3 | 978-0-582-42489-0 | 2000 |
| Longman Key Skills: Level 3: Communication | 978-0-582-42485-2 | 2000 |