Our intent is to provide the scientific community with access to technical reports written by members of the IBM Research community. Some reports are available for download. Once a technical report is published in either a journal or conference proceedings, it is sometimes replaced with a reference to the external source. Please respect any.
The history of operating systems running on IBM mainframes is a notable chapter of history of mainframe operating systems, because of IBM's long-standing position as the world's largest hardware supplier of mainframe computers. Arguably the operating systems which IBM supplied to customers for use on its early mainframes have seldom been very innovative, except for the virtual machine systems.