the moment this production is invoked. DEWOP is a semantic routine which respectively takes as its arguments a PDP-10 machine language opcode, a register object, and any other object, and produces an object whose value is the result of executing the designated machine instruction using as address field the object which is its last argument. In this example, the opcode 214B designates the Load Magnitude instruction, and thus the result of the above syntax statement will be to compile code to compute the absolute value of A. Folklore operating system IMP was the language used on NSA's homegrown time-sharing operating system named Folklore. See also Edinburgh IMP language (contrast) References External links PDP-10 IMP72 Reference Manual IMP72 Sources (dcus:[43,50306]*.*) Extensible syntax programming languages Systems programming languages National Security Agency