1. A system for a network of computers, including personal computers, comprising: means for network services, including browsing and broadcast functions, as well as shared computer processing such as parallel processing, to be provided to said personal computers within said network; at least two said personal computers; means for at least one of said personal computers, when idled by a personal user, to be made available temporarily to provide said shared computer processing services to said network; and means for monitoring on a net basis the provision of said services to each said personal computer.