- Operating system
- A program controlling the execution of other programs or commands in the computer. It enables several users to communicate with the computer at the same time. In ND computers, the operating system is called SINTRAN III.
- Norsk Data Document ND–06.026.01 ND-110 Functional Description , from Glossary
- Norsk Data Document ND–30.041.1 EN ND-100 SATELLITE OPERATOR GUIDE , from Terminology