Millions of websites now employ social login, driven by the fact that the old site-specific registration and password system is no longer scalable.

FORBES: How Social Login Is Changing Business--and Your Privacy

"The new IBM zEnterprise System represents a potentially revolutionary change to the platform and the next phase in the evolution of highly efficient, scalable processing opening up the possibility of hosting entire workloads on a single highly integrated system, " said Martin Kennedy, Managing Director, Citi's Enterprise System Infrastructure.

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

The group determined that the system had to be easy to use, fast, reliable, easy to administer, centrally manageable and scalable.

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