IBM doesn't license its mainframe operating system. The CCIA's central complaint against IBM is that it holds back the sale of its mainframe software to other IT companies whenever it perceives a ...

News Windows: Coming to a Mainframe Near You? By Stephen Swoyer 09/08/2009 IBM likes to promote its System z mainframe as the virtualization platform par excellence, and with good reason. Not only is ...

Rival Unisys lets users run Windows, Unix or Linux on top of its ES7000 or ClearPath servers, along with (in the latter case) both flavors of its proprietary mainframe operating system software. IBM ...

By integrating Windows onto its mainframe servers, IBM will allow customers to run applications across multiple operating environments while managing them as a single system.