The most outstanding feature of the book is five case studies of the most significant operating systems currently available—the UNIX system, VAX/VMS, CP/M, MVS, and VM. There are also case studies within the case studies: XENIX within the UNIX system case study; MP/M and CP/NET within the discussion of CP/M.
Another important feature of the book is its presentation of an Ada based treatment of concurrent programming.
More than 500 exercises, 200 pieces of art, and 100 charts, tables, and program listings further clarify and strengthen this extraordinary introduction to operating systems.