. "In one example, one of the computing units is a workstation 106 executing an operating system, such as Windows NT or LINUX, as examples, and the other computing unit is a server 108 executing the z/OS or OS/390 operating system offered by International Business Machines Corporation, Armonk, N.Y. Each computing unit includes, for example, a central processing unit (CPU) 110, memory 112, and one or" . . . .