@raccoon
A pc client by definition is a pc with so little resources that you can just boot an connect on a server over lan.
For example the French minitel was a pc clients, they just had the minimum to show text and connect to the phone network.

These days a client is considered a client even tho it has like 2~4GB of ram and a dual or quad core cpu, and that's notably because all of the big brains in the world use windows to run such system.