George E Laggis, Paul F Meyer: User and application program transparent resource sharing multiple computer interface architecture with kernel process level transfer of user requested services. AT&T Bell Laboratories, David Volejnicek, April 28, 1992: US05109515 (113 worldwide citation)

A computer network (FIG. 1) comprises a plurality of personal computers (PCs 10), groups of which are each logically connected to a different one of a plurality of intermediate computers (11). At least one of the intermediate computers is connected to a mainframe computer (12). File and resource ser ...