Work Flow Language, or WFL ("wiffle") is the process control language for the Burroughs large systems, including the Unisys ClearPath/MCP series, and their operating system Master Control Program.
Developed soon after the B5000 in 1961, WFL is the ClearPath equivalent of the Job Control Language (JCL) on IBM mainframes and the shell scripts of Unix-like operating systems.
WFL programs are compiled to binary executables like any other MCP subject.
in order to connect hardware devices and open files for programs.
Upon executing a WFL job it would check to determine if the object was compatible with the OS version.