At Citi, IBM System z plays a major role as a core processing engine of virtually every line of business at the global financial services company.

ENGADGET: IBM's zEnterprise architecture makes mainframes cool again, also efficient (video)

The county is also using SPSS predictive analytics software, Cognos business intelligence software, i2 Intelligent Law Enforcement solution, a private cloud system on zLinux hosted on an IBM System z mainframe and IBM PureFlex System.

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The new systems design combines IBM's new zEnterprise mainframe server with new technology--the IBM zEnterprise BladeCenter Extension and the IBM zEnterprise Unified Resource Manager--that enable it to manage workloads running across System z, and select POWER7 and System x servers.

ENGADGET: IBM's zEnterprise architecture makes mainframes cool again, also efficient (video)