Before revision: In MVS the address space includes an additional pageable shared area, the Common Storage Area (CSA), and an additional private area, the System Work area (SWA).
After revision: In MVS the address space includes an additional pageable shared area, the Common Storage Area (CSA), and two additional private areas, the nonpageable local system queue area (LSQA) and the pageable System Work area (SWA).