Norsk DatorMagazin was the little sister to the bigger and original DatorMagazin (DMZ) that was distributed in Sweden.
The first issue of the Norwegian 16-page version started in November 1988 and most likely lasted until at least June 1989 (reference to a article written in Swedish DatorMagazin 9-89, page 3).
If I remember correctly the Norwegian version was wrapped or bundled with the Swedish version, and you basically paid for two magazines in one over the desk/shop. 1 big magazine of around 50-70 pages along with the slimmer Norwegian 16-page.
The format of the Norwegian version was kind of A3, regular newspaper quality and mostly internally greyscale, but with front/back and middle in full-color. The magazine had alot of subscribers and was a healthy magazine, but due to lack of slowdown in the advertisement market and actual physical sales over disk, it was shut down abruptly.