Not even the articles from the webpage you've linked talks about "...big computers (servers) [...] with dumb terminals" nor that the concept of client/server is > The core concept is that you only have 1 computer, the host. [...] On users' desks they have just terminals, which are not computers

Opposite of what you write the linked page starts with

"In a client-server system, a large number of personal computers communicate with shared servers on a local area network" and later explicitly lists continues with references to Microsoft (N)OS. And then the refecence from NOS leeds us to "There are only a few popular choices – Novell, UNIX, Linux, and Windows. The complexity of NOS forces a simple overview of the features and benefits."

So I don't really understand what you point that Netware neither was a file-- nor a print-server.