The recent warez mega dump has unearthed NetWare 3.0, also known as NetWare 386, released by Novell in 1989. This 32-bit network operating system required a 386 processor and utilized NetWare Loadable Modules for simpler installation and maintenance compared to its predecessor, NetWare 2.x. Despite being limited in its features and lacking NLM support initially, NetWare 3.0 was a fully functioning file server capable of supporting up to 250 users. The installation process was different from NetWare 2.x, with the OS kernel being loaded dynamically as separate modules. NetWare 3.0 was a rare find due to limited sales and high pricing, making it a gem resurrected by software pirates after 35 years.
http://www.os2museum.com/wp/1989-networking-netware-386/