IBM's family of 64-bit mainframes, introduced in 2000 as the zSeries. IBM mainframes sell from $75 thousand to $10 million. They are robust, mission critical computer systems that support hundreds and thousands of users at terminals and desktop computers. Z machines run under
z/OS and
Linux.
The 21st Century Mainframe
In 2000, the Z architecture was a major upgrade to previous ESA/390 mainframes. The "Z" reflects "zero" downtime because these machines have built-in redundancy for major components. Following is a list of models starting in 2000. Enterprise means high-end. See
z/OS,
zEnterprise,
z/Architecture,
IBM branding and
System/390.
Year Mainframe
Intro. Model Class
2024 System z17 Telum Enterprise
2022 System z16 3932 Enterprise
2019 System z15 3931 Enterprise
2018 System z14 3907 Enterprise
2017 System z14 3906 Enterprise
2016 System z13 2965 Enterprise
2015 System z13 2964 Enterprise
2013 zEnterprise BC12 Business
2012 zEnterprise EC12 Enterprise
2011 zEnterprise 114 Enterprise
2010 zEnterprise 196 Enterprise
2008 System z10 EC Enterprise
2008 System z10 BC Business
2006 System z9 BC Business
2005 System z9 EC Enterprise
2004 zSeries 890 Business
2003 zSeries 990 Enterprise
2002 zSeries 800 Business
2000 zSeries 900 Enterprise
IBM Z17
The top-of-the-line Z17 mainframe can include up to 48 Spyre accelerator cards designed for AI inference (execution). The Z17 can be configured with more than 200 processing cores and up to 64 terabytes of memory. (Image courtesy of IBM.)