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.
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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.
