1. A method of abstractly and recursively defining a functional service utilizing a process agent comprising: (a) storing a library of first software programs for operation of system resources, (b) storing a second software program for operation of a service agent which provides said functional service, and which includes pointers to associated ones of the first software programs which are controlled by the service agent, (c) storing a software program for assembling a general process to provide said functional service, including the steps of: (i) requesting the usage right for system resources controlled by the service agent required by the general process, (ii) sending a set of pointers to system resources required for the general process from the service agent to the software program for invoking the general process, and (iii) storing said set of pointers sent from the service agent in association with the software program for operating the general process to provide said functional service on demand, and (d) adding said functional service to said library by adding said set of stored pointers sent from the service agent as a first software program, and providing a pointer to said first software program.