page_title: IBM System/390
hierarchical_section_title: IBM System/390
caption_attribution_description: S/390 Generation 5, cover closed. Photo taken by myself.
context_page_description: The IBM System/390 was the third generation of the System/360 instruction set architecture. The first ESA/390 computer was the Enterprise System/9000 family, which were introduced in 1990. These were followed by the CMOS System/390 mainframe family in the mid-1990s. These systems followed the IBM 3090, with over a decade of follow-ons. The ESA/390 was succeeded by the 64-bit z/Architecture in 2000.
context_section_description: The IBM System/390 was the third generation of the System/360 instruction set architecture. The first ESA/390 computer was the Enterprise System/9000 (ES/9000) family, which were introduced in 1990. These were followed by the CMOS System/390 mainframe family in the mid-1990s. These systems followed the IBM 3090, with over a decade of follow-ons. The ESA/390 was succeeded by the 64-bit z/Architecture in 2000.
caption: Front cover of the IBM S/390 Parallel Enterprise Server Generation 5
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