Citrix WinFrame

Citrix WinFrame (codenamed SouthBeach) is a specialized version of Windows NT 3.51 developed by Citrix Systems, Inc. and released on September 1995. The operating system is designed to allow multiple clients running MS-DOS or Microsoft Windows to connect to a single centralized server and access applications over a network. The technology for WinFrame would later be adopted into Microsoft's own Windows NT operating system with the release of Windows NT 4.0 Terminal Server Edition, and would eventually evolve into the Remote Desktop Services component in later versions of Windows.

Citrix WinFrame development was discontinued after the release of Windows NT 4.0 Terminal Server Edition. Citrix then rebadged WinFrame applications as an add-on for Windows Servers with Terminal Services installed, known as Citrix MetaFrame.