1989 networking: NetWare 386
In September 1989, Novell released NetWare 386 V3.0, the first in a long line of 32-bit network operating systems. At the time, Novell's mainstay was NetWare 2.15, a system designed to run on 286-based machines.
NetWare 386, as the name suggests, required at least a 386 processor. It was a major redesign of the NetWare OS intended to take advantage of (then) high end 32-bit hardware. Whereas NetWare 2.x was linked from object modules during installation (much like commercial UNIX implementations), NetWare 386 utilized modules (NLMs, or NetWare Loadable Modules) which could be loaded and unloaded at run-time.
Michal Necasek
NetWare 386 or 3.0 was a very limited release, with very few copies sold before it was superseded by newer versions. As such, it was considered lost to time, since it was only sold to large corporations - for a massive almost 8000 dollar price tag - who obviously didn't care about software preservation. There are no original disks left, but a recent warez" release has made the software available once again.
As always, pirates save the day.