The economics of mainframe computing are often poorly understood -- and yet multi-million dollar platform decisions are made based on hearsay, anecdote and inaccurate accounting systems. For any platform decision, the needs of a company's stakeholders are best served by a wide understanding of the true costs and the potential economic ramifications of the alternatives. This session will explore the reality and dynamics of the true Total Cost of Ownership of enterprise servers and the mainframe. The speaker will use many real-life customer examples to illustrate the underlying phenomena. IBM's zEnterprise unifies hardware and software that is optimized to enable hybrid computing. The speaker will conclude by examining the potential of zEnterprise to further optimize hardware, software, labor and facilities costs.