IBM 704/9/90 FORTRAN Assembly Program
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FORTRAN Assembly Program (FAP) was a macro assembler for the IBM 709, 7090, and 7094 computers of the 1950s and 60s.
Its pseudo-operation BSS, used to reserve memory, is the origin of the common name of the "BSS section", still used in many assembly languages today for designating reserved memory address ranges of the type not having to be saved in the executable image.