| title | ISBN-13 | year of publication |
|---|---|---|
| NATARS MICRO | 978-0-13-609728-0 | 1993 |
| NATARS MICRO TEXT/BNDR/DK/DKHD | 978-0-13-609652-8 | 1990 |
| Natars Mini/1 | 978-0-13-609504-0 | 1992 |
| Natars Mini/2 | 978-0-13-609629-0 | 1989 |
| World Travel | 978-0-13-964628-7 | 1979 |
| Worldwide Cruises Shiplines | 978-0-13-964636-2 | 1992 |
| Worldwide Tours | 978-0-13-964644-7 | 1992 |