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OS 2200 is the operating system for the Unisys ClearPath Dorado family of mainframe systems. The operating system kernel of OS 2200 is a lineal descendant of Exec 8 for the UNIVAC 1108. Documentation and other information on current and past Unisys systems can be found on the Unisys public support website.〔Current Unisys documentation is available on the (Unisys public support web site ). For OS 2200 products, select one of the ClearPath Dorado platforms (e.g., Dorado 800 or Dorado 8300) and then the release level (usually the highest numbered one unless you are looking for something specific in an earlier release). That will take you to a search page where you can search by title or document content.〕 See Unisys 2200 Series system architecture for a description of the machine architecture and its relationship to the OS 2200 operating system. == History == There were earlier 1100 systems going back to the 1101 in 1951, but the 1108 was the first 1100 Series computer designed for efficient support of multiprogramming and multiprocessing. Along with this new hardware came the operating system Exec 8 (Executive System for the 1108). The UNIVAC 1108 computer was announced in 1964 and delivered in late 1965. The first 1108 computers used Exec I and Exec II, which had been developed for the UNIVAC 1107. However, UNIVAC planned to offer symmetric multiprocessor versions of the 1108 with up to 4 processors and the earlier operating systems (really ''basic monitor'' programs) weren’t designed for that, even though they supported limited multiprogramming. When the UNIVAC 1110 was introduced in 1972, the operating system name was changed to OS 1100 to reflect its support for the wider range of systems. The name OS 1100 was retained until 1988 with the introduction of the Sperry 2200 Series as a follow on to the 1100 Series when its name was changed to OS 2200. Since that time, the 2200 Series became the Unisys ClearPath IX Series and then the Unisys ClearPath Dorado Series, but the operating system retained the OS 2200 name. The company name and its product names also changed over time. Engineering Research Associates (ERA) of Saint Paul was acquired by Remington Rand Corporation. Remington Rand also acquired the Eckert–Mauchly Computer Corporation of Philadelphia which was then building the UNIVAC computer. The two were combined into the UNIVAC division of Remington Rand under the direction of William Norris. William Norris had been one of the founders of ERA and later left Remington Rand to start Control Data Corporation. The UNIVAC division of Remington Rand Corporation became the UNIVAC division of Sperry Rand Corporation after Remington Rand merged with Sperry Corporation. In the 1970s Sperry Rand began a corporate identity program that changed its name to Sperry Corporation and all the division names to begin with Sperry, so the computer systems division became Sperry UNIVAC. Later the division names were dropped and everything simply became Sperry. The operating system kernel is still referred to as "the Exec" by most Unisys and customer personnel. However, when Unisys began releasing suites of products tested together as system base releases, later called "ClearPath OS 2200 Release ''n''", the term OS 2200 changed to refer to the entire suite of products in the system release and others, such as BIS, released asynchronously for the Dorado hardware platforms. In 1986 Burroughs and Sperry corporations merged to become Unisys (which some long time 2200 Series clients say stands for "UNIVAC Is Still Your Supplier"). The major mainframe product lines of both companies have continued in development including the MCP Operating System from Burroughs and OS 2200 from Sperry. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OS 2200」の詳細全文を読む スポンサード リンク
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