MS-DOS 6.00 Upgrade 3.5" (Dutch/Nederlands)
One of two copies I own: MS-DOS 6.00 Dutch 3.5" Upgrade. Neither of the copies I own are the original boxed copy I bought when I was 14 years old. I remember the immense leap forward this system had over MS-DOS 5.0: We loved memmaker to manage memory, the Virus Scanner, Disk Doubler: This was the first time Microsoft bundled software that before we had to install from other companies.