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VAX 9000
The VAX 9000, code named ''Aridus'' or ''Aquarius'', was a family of supercomputer and mainframe computers developed and manufactured by Digital Equipment Corporation (DEC) using processors implementing the VAX instruction set architecture (ISA). ''Aridus'' was a follow-on to the VAX 8800 family line. The VAX 9000 code named ''Aquarius'' was positioned by Digital as its first mainframe.〔Jane C. Blake, "Editor's Introduction", ''Digital Technical Journal'', Volume 2, Number 4, Fall 1990.〕 In reality, it was Digital's second mainframe attempt, following their earlier and more successful 36-bit mainframe line (PDP-6 through DECSYSTEM-20) dating from the mid-1960s through early 1980s.〔"an environment of DEC mainframes like the PDP-10"〕 Initially, it was marketed as a supercomputer.
The VAX 9000 was introduced in October 1989〔(DIGITAL Computing Timeline )〕 and faced problems such as the inability to ship large volumes.〔John Markoff. "Market Place; Digital Finally Follows a Trend". The New York Times, 16 July 1990〕 It was designed to be water-cooled using the same plumbing as IBM mainframes and code-named ''Aquarius'' (“water-carrier”), but were first air-cooled ''Aridus'' (“dry”). The first models delivered were "field-upgradeable" to ''Aquarius'' as Model 210 follow-on but Digital officials thought nobody would require it, so they didn't offer it.〔
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Roughly four dozen systems were delivered before production was discontinued. Most sites ran the VMS operating system with a few sites choosing Ultrix. The pedigree of the vectorizing Fortran compiler is not clear. One representative example CPU sits in storage at the Computer History Museum (not on public display).
== Models ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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