ZEnterprise System

IBM zEnterprise System is the latest line of IBM mainframes designed to offer both mainframe and distributed server technologies in an integrated system. The zEnterprise System consists of three components. First is a System z server - a choice of the newest enterprise class server, the IBM zEnterprise EC12 that was announced August 28, 2012, the smaller business class server the IBM zEnterprise 114 (z114) announced July 2011, or the older enterprise-class server the IBM zEnterprise 196 (z196) that was introduced July 2010. Second is the IBM zEnterprise BladeCenter Extension (zBX), the infrastructure designed to provide logical integration and host IBM WebSphere DataPower Integrated Appliance XI50 for zEnterprise (DataPower XI50z) or general purpose x86 or Power blades. Last is the management layer, IBM zEnterprise Unified Resource Manager (zManager), which provides a single management view of zEnterprise resources.

In July 2013, IBM introduced an updated version of the z114 called the zBC12 and a special version of it designed to be a Linux virtualization server, the zBC12 Enterprise Linux Server running only Linux hosts on the underlying z/VM hypervisor.

In January 2015, IBM introduced the z13 mainframe and in February 2016, the z13s was introduced. It is the last z Systems server to support running an operating system in ESA/390 architecture mode.

In July 2017, IBM introduced the z14 mainframe.

Launched in July 2017 the z14 or just IBM Z is based on the z14 chip, a 10-core processor running at 5.2 GHz. A z14 system can have a maximum of 240 Processing Unit (PU) cores, 170 of which can be configured to the customer's specification to run applications and operating systems, and up to 32 TB usable redundant array of independent memory (RAIM), some of which can be configured as Virtual Flash Memory (VFM). Each PU can be characterized as a Central Processor (CP), Integrated Firmware Processor (IFP), Integrated Facility for Linux (IFL) processor, Integrated Information Processor (zIIP), Internal Coupling Facility (ICF) processor, additional System Assist Processor (SAP) or as a spare. The focus of the IBM Z systems are pervasive encryption as the z14 processor has plenty of hardware assisted cryptography features.

...
Wikipedia