Will the other compilers at the other centers do likewise? Second, there is the question of the interpretation, at one center, of requests directed to it from another center. I visualize vaguely some kind of an interpretive system that would serve to translate the incoming language into commands or questions of the form in terms of which the interrogated center operates. Alternatively, of course, the translation could be done at the sending end. Still alternatively, the coordination could be so good that everybody spoke a common language and used a common set of formates. Third, there is the problem of protecting and updating public files. I do not want to use material from a file that is in the process of being changed by someone else. There may be, in our mutual activities, something approximately analogous to military security classification. If so, how will we handle it?