Input (grade 13): He and Jon von Tetzchner were part of a research group at the Norwegian state phone company (now known as Telenor) where they developed browsing software called MultiTorg Opera.
Output (grade 8): He and Jon Stephenson von Tetzchner were part of a research group at the Norwegian state telephone company (now known as Telenor). They made browsing software called MultiTorg Opera.