1341	 Levels of Computer Systems	 In building current computer systems we tend to break them down into levels of control command and communication in using the system we break our problems down correspondingly. The continued use of such a structure raises questions about its effects on the usefulness of future systems particularly with regard to such trends as time sharing parallel programming and eventually systems which learn. In this essay some of these questions are posed and the general attitude we must take in pursuing the problem further is discussed.
