Terminal Server Edition — Windows Nt 4.0

A common confusion: WinFrame was Citrix's own OS based on NT 3.51. TSE was Microsoft's direct competitor. By 1999, Microsoft forced Citrix to pivot to being an add-on rather than a competitor, leading to a mutually beneficial duopoly.

This version laid the groundwork for what eventually became Remote Desktop Services in modern Windows Server versions. Technical Constraints windows nt 4.0 terminal server edition