>> X client and server are usually the same machine, but they don't have to be. When I was in college there were rooms full of X-terminals which would be used

>> X client and server are usually the same machine, but they don't have to be. When I was in college there were rooms full of X-terminals which would be used to remote into various bigger workstations. You could also sit locally at one of those machines, but plenty could be done over the network and by more people on lower cost hardware.