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OS Design











              Distributed Operating                                                    Object-Oriented


                               System                                                            Design




              Provides the illusion of                                        Used for adding modular


                    a single main memory space                                   extensions to a small kernel

                   single secondary memory                                    Enables programmers to
                      space                                                       customize an operating system

                   unified access facilities                                     without disrupting system


                                                                                  integrity
              State of the art for distributed

                  operating systems lags that of                               Eases the development of
                  uniprocessor and SMP operating
                  systems                                                         distributed tools and full-blown
                                                                                  distributed operating systems
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