| UK and worldwide | Polyhedron Software & Services Ltd | www.polyhedron.com |
| Europe | QT Software GmbH | www.qtsoftware.de |
| UK and Europe | Alfasoft Ltd | www.alfasoft.com |
| North America | Tallac Technology LLC | www.tallactech.com |
| Australia and New Zealand | Computer Transition Systems | www.cts.com.au |
| Japan | Kagaku Gijutsu-Sha | www.kagaku.com |
