SEMINAR ON PLAN9 OPERATING SYSTEM : By mid-1980's, the development of computers from large centralized time-based computers, networks, toward the smaller, personal workstation typically UNIX. People were tired of too bureaucratic timesharing machines and were willing to move to smaller systems of self-preservation, even if it meant a net loss of power. As microcomputers became faster, even that loss was recovered, and this style of computing remains popular today.
Plan 9 began in late 1980 as an attempt to have it both ways: to build a system that was centrally administered and cost flights using modern microcomputers as its computing elements. The idea was to build a system time-sharing work stations, but a new way. Different computers would deal with different tasks: small cheap machines in the offices of people who serve as terminals providing access to large central, shared resources such as computing servers and file servers. For the central machines, seemed the next wave of shared-memory multiprocessors obvious candidates.
Plan 9 is built around this fundamental principle that all resources appear as files in a hierarchical file system that is unique to each process. For designing an operating system different things, like designing the implementation of file system and directory, and various interfaces are important. Plan 9 has all the thoughtful features. All these help to provide a solid basis for the operating system that might be appropriate in a distributed environment and network.
Various features of the Plan 9 operating system are:
system dump file is a daily snapshot of your file storage available to users.
Unicode character set supported throughout the system.

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