The IBM System/390 is a discontinued mainframe product family implementing ESA/390, the fifth generation of the System/360 instruction set architecture. The first computers to use the ESA/390 were the
Inside the IBM S/390 Parallel Enterprise Server Generation 4
IBM S/390 Parallel Enterprise Server Gen4
IBM Z is a family name used by IBM for all of its z/Architecture mainframe computers. In July 2017, with another generation of products, the official family was changed to IBM Z from IBM z Systems; th
IBM System/390
…IBM 30XX mainframe lines IBM 303X IBM 308X IBM 3090 IBM Z IBM IBM Z mainframe homepage Current IBM Z mainframe servers "A Brief History of the IBM ES/9000, System/390 AND zSeries" (PDF). IBM Archives. Archived…
A single-frame IBM z15 mainframe. Larger capacity models can have up to four total frames. This model has blue accents, as compared with the LinuxONE III model with orange highlights.
An IBM z14 mainframe. It is distinguished from the LinuxONE model by the blue accents on the doors.
A pair of IBM mainframes. On the left is the IBM z13 (while the naming was changed, the z13 line had a zSystems label on doors). On the right is the IBM LinuxONE Rockhopper.
A trio of IBM zEnterprise mainframe computers. From left to right: EC12, BC12, Bladecenter Extension.