A technology developed by Citrix Systems that turns Windows NT into a multi-user operating system. Together with another Citrix technology called ICA, WinFrame enables a Windows NT server to function like a minicomputer. The result is that network users on non-Windows machines (e.g., Macintoshes, DOS systems, and UNIX machines) can run Windows applications. The actual applications are executed on the WinFrame Application Server; the client machines are just terminals, used only for entering user input and displaying application output.
The ICA protocol is responsible for sending input and output between the client machines and the WinFrame server. Conceptually, the protocol is similar to X-Window, which serves the same purpose for UNIX systems.