Standard Windows NT 4.0 assumed one person (or at least one interactive console session). TSE included the "Winstation" driver and a heavily modified graphics subsystem. It could create separate, isolated workspaces for dozens of users simultaneously, each thinking they were the only person using the PC.
To connect to TSE, you needed the "Terminal Server Client." It ran on:
The client was a tiny executable (often fitting on a floppy disk). It was the original "bring your own device" tool—you could dial into your corporate server from a Compaq laptop running Windows 95 over a PPP connection and have a full NT desktop.
In the late 1990s, the corporate computing landscape was in transition. The "fat client" model—where every desktop required a powerful, expensive PC running a full local installation of Windows—was becoming a nightmare for IT administrators. Software conflicts, hardware driver issues, and the sheer cost of upgrading hardware for Windows 95 and 98 were escalating.
Enter Windows NT 4.0 Terminal Server Edition (TSE). Released by Microsoft in June 1998, this operating system was a radical departure from the norm. It introduced a architecture that would eventually evolve into the Remote Desktop Services we use today, bringing the concept of "thin client" computing to the mainstream Windows world.
TSE functioned as a centralized computing engine:
This allowed organizations to extend the life of older hardware (x86, 386/486 machines) by turning them into “thin clients.”
Windows NT 4.0 TSE was a separate product, not just a role added to the standard NT 4.0 Server. It required: